56515215 has 32 divisors (see below), whose sum is σ = 96825600. Its totient is φ = 28062720.

The previous prime is 56515189. The next prime is 56515241. The reversal of 56515215 is 51251565.

It is an interprime number because it is at equal distance from previous prime (56515189) and next prime (56515241).

It is not a de Polignac number, because 56515215 - 2⁵ = 56515183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15135 + ... + 18495.

It is an arithmetic number, because the mean of its divisors is an integer number (3025800).

Almost surely, 2^56515215 is an apocalyptic number.

56515215 is a deficient number, since it is larger than the sum of its proper divisors (40310385).

56515215 is a wasteful number, since it uses less digits than its factorization.

56515215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447.

The product of its digits is 7500, while the sum is 30.

The square root of 56515215 is about 7517.6602078040. The cubic root of 56515215 is about 383.7559552316.

The spelling of 56515215 in words is "fifty-six million, five hundred fifteen thousand, two hundred fifteen".