215632564 has 12 divisors (see below), whose sum is σ = 431265184. Its totient is φ = 92413944.

The previous prime is 215632553. The next prime is 215632597. The reversal of 215632564 is 465236512.

215632564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

215632564 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850554 + ... + 3850609.

Almost surely, 2^215632564 is an apocalyptic number.

It is an amenable number.

215632564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215632564 is a wasteful number, since it uses less digits than its factorization.

215632564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701174 (or 7701172 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 215632564 is about 14684.4327095057. The cubic root of 215632564 is about 599.6595883846.

The spelling of 215632564 in words is "two hundred fifteen million, six hundred thirty-two thousand, five hundred sixty-four".