215902964 has 24 divisors (see below), whose sum is σ = 383604480. Its totient is φ = 106311744.

The previous prime is 215902933. The next prime is 215902979. The reversal of 215902964 is 469209512.

It is a super-2 number, since 2×215902964² = 93228179727970592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99677 + ... + 101819.

It is an arithmetic number, because the mean of its divisors is an integer number (15983520).

Almost surely, 2^215902964 is an apocalyptic number.

It is an amenable number.

215902964 is a deficient number, since it is larger than the sum of its proper divisors (167701516).

215902964 is a wasteful number, since it uses less digits than its factorization.

215902964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 215902964 is about 14693.6368540944. The cubic root of 215902964 is about 599.9101383940.

The spelling of 215902964 in words is "two hundred fifteen million, nine hundred two thousand, nine hundred sixty-four".