82 (number)

← 81 82 83 →
← 80 81 82 83 84 85 86 87 88 89 → List of numbers Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	eighty-two
Ordinal	82nd (eighty-second)
Factorization	2 × 41
Divisors	1, 2, 41, 82
Greek numeral	ΠΒ´
Roman numeral	LXXXII, lxxxii
Binary	10100102
Ternary	100013
Senary	2146
Octal	1228
Duodecimal	6A12
Hexadecimal	5216

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

1. Sloane, N. J. A. (ed.). "SequenceA001358". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
2. "Sloane's A002203 : Companion Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
3. "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.