82 (eighty-two) is the natural number following 81 and preceding 83.
In mathematics
82 is:
- the twenty-seventh semiprime[1] and the thirteenth of the form (2.q).
- with an aliquot sum of 44, within an aliquot sequence of four composite numbers (82,44,40,50,43,1,0) to the Prime in the 43-aliquot tree.
- a companion Pell number.[2]
- a happy number.[3]
- palindromic in bases 3 (100013), 9 (1019) and 40 (2240).
In science
- The sixth magic number.
References
- ^ Sloane, N. J. A. (ed.). "Sequence A001358". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ "Sloane's A002203 : Companion Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.