82130256 has 120 divisors (see below), whose sum is σ = 251339816. Its totient is φ = 24883200.

The previous prime is 82130227. The next prime is 82130287. The reversal of 82130256 is 65203128.

It can be written as a sum of positive squares in 4 ways, for example, as 13571856 + 68558400 = 3684^2 + 8280^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136356 + ... + 136956.

Almost surely, 2^82130256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82130256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125669908).

82130256 is an abundant number, since it is smaller than the sum of its proper divisors (169209560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82130256 is a wasteful number, since it uses less digits than its factorization.

82130256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 82130256 is about 9062.5744686596. The cubic root of 82130256 is about 434.6780654084.

The spelling of 82130256 in words is "eighty-two million, one hundred thirty thousand, two hundred fifty-six".