215534868 has 48 divisors (see below), whose sum is σ = 517345920. Its totient is φ = 69798400.

The previous prime is 215534807. The next prime is 215534887. The reversal of 215534868 is 868435512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137473 + ... + 139031.

It is an arithmetic number, because the mean of its divisors is an integer number (10778040).

Almost surely, 2^215534868 is an apocalyptic number.

It is an amenable number.

215534868 is an abundant number, since it is smaller than the sum of its proper divisors (301811052).

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

215534868 is a wasteful number, since it uses less digits than its factorization.

215534868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888 (or 1886 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 215534868 is about 14681.1058166611. The cubic root of 215534868 is about 599.5690127129.

The spelling of 215534868 in words is "two hundred fifteen million, five hundred thirty-four thousand, eight hundred sixty-eight".