82521900 has 54 divisors (see below), whose sum is σ = 258663132. Its totient is φ = 22005600.

The previous prime is 82521871. The next prime is 82521919. The reversal of 82521900 is 912528.

It is a super-2 number, since 2×82521900² = 13619727959220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 44946 + ... + 46745.

It is an arithmetic number, because the mean of its divisors is an integer number (4790058).

Almost surely, 2^82521900 is an apocalyptic number.

It is an amenable number.

82521900 is an abundant number, since it is smaller than the sum of its proper divisors (176141232).

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

82521900 is a wasteful number, since it uses less digits than its factorization.

82521900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91711 (or 91701 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 82521900 is about 9084.1565376209. The cubic root of 82521900 is about 435.3679012054.

The spelling of 82521900 in words is "eighty-two million, five hundred twenty-one thousand, nine hundred".