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82 (number)

82 (eighty-two) is the natural number following 81 and preceding 83.

In mathematics

Eighty-two is the twenty-third biprime and the twelfth of the form (2.q). The aliquot sum of 82 is 44 within the aliquot sequence (82,44,40,50,43,1,0)) 82 being the eighth composite number in the 43-aliquot tree.

Eighty-two is a companion Pell number.

In astronomy

• Messier 82, a starburst galaxy in the constellation Ursa Major
• The New General Catalogue object NGC 82, a single star in the constellation Andromeda
• The Saros number of the solar eclipse series which began on -293 April 22 and ended on 969 May 19. The duration of Saros series 82 was 1262.1 years, and it contained 71 solar eclipses. The Saros number of the lunar eclipse series which began on -226 September 10 and ended on 1289 March 8. The duration of Saros series 82 was 1514.5 years, and it contained 85 lunar eclipses.

In other fields

Eighty-two is also:

• The atomic number of lead
• In physics, the sixth Magic Number
• the model number of: Mark 82 bomb, a nonguided general purpose bomb
• the number of the French department Tarn-et-Garonne
• the code for international direct dial phone calls to South Korea
• The ISBN Group Identifier for books published in Norway
• Title of Dennis Smith's book about firefighters: Report from Engine Co. 82
• The year AD 82, 82 BC, or 1982.
• The number of Trip Murphy's (Matt Dillon) car in Herbie Fully Loaded (2005).
• The number (*82) to unblock your caller ID for phones that block anonymous incoming calls
• The Shannon number, or the theoretical number of possible chess games, is approximately equal to 82 factorial, or the number of different ways to arrange 82 objects. This number is about 4.75364334 × 10¹²², or 10⁴² times the number of atoms in the universe!
• I Spy ran on television 1965-1968 for 82 episodes
• Raymond counts fallen toothpicks in increments of 82 in the movie Rain Man.

In sports

• The number of games in both NBA and NHL regular seasons

NFL

• Arizona Cardinals Kevin Kasper wore #82
• Baltimore Colts Raymond Berry wore #82
• Cleveland Browns Ozzie Newsome wore #82
• Pittsburgh Steelers Antwaan Randle El wore #82
• Pittsburgh Steelers John Stallworth wore #82
• Denver Broncos Stephen Alexander wears 82
• Dallas Cowboys Jason Witten wears #82
• Detroit Lions Casey Fitzsimmons wears #82
• Minnesota Vikings Troy Williamson wears #82
• Philadelphia Eagles Jason Avant wears #82
• Chicago Bears Greg Olsen wears #82

NHL

• New York Rangers Martin Straka wears #82