82 (number)

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

In mathematics

82 is:

• the twenty-seventh semiprime 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.
• a happy number.
• palindromic in bases 3 (10001₃), 9 (101₉) and 40 (22₄₀).

In science

• The sixth magic number.

References