22 (number)

22 (twenty-two) is the natural number following 21 and preceding 23.

← 21 22 23 →
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Cardinaltwenty-two
Ordinal22nd
(twenty-second)
Factorization2 × 11
Divisors1, 2, 11, 22
Greek numeralΚΒ´
Roman numeralXXII
Binary101102
Ternary2113
Quaternary1124
Quinary425
Senary346
Octal268
Duodecimal1A12
Hexadecimal1616
Vigesimal1220
Base 36M36

In mathematics

In physics and chemistry

In aircraft
  • 22 is the designation of the USAF stealth fighter, the F-22 Raptor.

In art, entertainment, and media

In music
  • "Twenty Two" is a 1997 song by the punk band Millencolin
  • In Jay-Z's song "22 Two's", he rhymes the words: too, to, and two, 22 times in the first verse.
  • "22 Acacia Avenue" is a song by Iron Maiden on the album The Number of the Beast
  • Catch 22 is an album by death metal band Hypocrisy
  • "22" is a song by Lily Allen on the album It's Not Me, It's You.
  • 22 Dreams is a song and album by Paul Weller. The album contains 22 songs on it.
  • The Norwegian electronica project Ugress uses 22 as a recurring theme. All four albums feature a track with 22 in the title.
  • "22" is a song by Taylor Swift on her fourth album Red
  • "The Number 22" is a song by Ashbury Heights on the album The Looking Glass Society.
  • 22, A Million is an album by Bon Iver. The first track of the album is called "22 (OVER SOON)".
  • Cubic 22 was a Belgian techno duo.
  • "22" is a song by the English alternative rock band Deaf Havana on their album Old Souls
  • "22" is a song by the Irish singer Sarah McTernan. She will represent Ireland with this song in Eurovision 2019.

In other fields
  • Catch-22 (1961), Joseph Heller's novel, and its 1970 film adaptation gave rise to the expression of logic "catch-22".
  • Revista 22 is a magazine published in Romania.
  • There are 22 stars in the Paramount Pictures logo.
  • "Twenty Two" (February 10, 1961) is Season 2–episode 17 (February 10, 1961) of the 1959-64 TV series The Twilight Zone, in which a hospitalized dancer has nightmares about a sinister nurse inviting her to Room 22, the hospital morgue.
  • Traditional Tarot decks have 22 cards with allegorical subjects. These serve as trump cards in the game. The Fool is usually a kind of wild-card among the trumps and unnumbered, so the highest trump is numbered 21. Occult Tarot decks usually have 22 similar cards which are called Major Arcana by fortune-tellers. Occultists have related this number to the 22 letters of the Hebrew alphabet and the 22 paths in the Kabbalistic Tree of Life.

In computing and technology

In religion

In sports
  • In both American football and association football, a total of 22 players (counting both teams) start the game, and this is also the maximum number of players that can be legally involved in play at any given time.
  • In Australian rules football, each team is allowed a squad of 22 players (18 on the field and 4 interchanges).
  • The length of a cricket pitch is 22 yards.
  • In rugby union, the "22" is a line in each half of the field which is 22 meters from the respective try line. It has significance in a number of laws particularly relating to kicking the ball away.
  • A snooker game (called a "frame") starts with 22 coloured balls at specified locations on the table (15 red balls and 7 others).

In weights and measures

In other uses

Twenty-two may also refer to:

  • 22 is the number of the French department Côtes-d'Armor
  • "22" is a common name for the .22 calibre .22 Long Rifle cartridge.
  • In French jargon, "22" is used as a phrase to warn of the coming of the police (typically "22, v'là les flics !" (In English: "5-0! Cops!")
  • In photography, f/22 is the largest f-stop (and thus smallest aperture) available on most lenses made for single-lens reflex cameras
  • The total number of cases on Deal or No Deal

See also

References
  1. Sloane, N. J. A. (ed.). "Sequence A000326 (Pentagonal numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  2. Sloane, N. J. A. (ed.). "Sequence A069099 (Centered heptagonal numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  3. Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1986): 31
  4. Sloane, N. J. A. (ed.). "Sequence A000124 (Central polygonal numbers (the Lazy Caterer's sequence))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  5. Sloane, N. J. A. (ed.). "Sequence A002088 (Sum of totient function)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  6. Sloane, N. J. A. (ed.). "Sequence A001608 (Perrin sequence)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  7. Sloane, N. J. A. (ed.). "Sequence A059756 (Erdős-Woods numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  8. Sloane, N. J. A. (ed.). "Sequence A006753 (Smith numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  9. Martin, Oscar (2006). "Look-and-Say Biochemistry: Exponential RNA and Multistranded DNA" (PDF). American Mathematical Monthly. Mathematical association of America. 113 (4): 289–307. doi:10.2307/27641915. ISSN 0002-9890. Archived from the original (PDF) on 2006-12-24. Retrieved 2018-11-21.
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