82 (eighty-two) is the natural number following 81 and preceding 83.
In mathematics 82 is a happy number and a companion Pell number. It is palindromic in bases 3 (100013), 9 (1019) and 40 (2240). With an aliquot sum of 44, 82 is within an aliquot sequence of four composite numbers (82, 44, 40, 50, 43, 1, 0) to the prime in the 43-aliquot tree.
In physics 82 is the sixth magic number.
References