56515870 has 16 divisors (see below), whose sum is σ = 103123440. Its totient is φ = 22296384.

The previous prime is 56515859. The next prime is 56515897. The reversal of 56515870 is 7851565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37980 + ... + 39439.

It is an arithmetic number, because the mean of its divisors is an integer number (6445215).

Almost surely, 2^56515870 is an apocalyptic number.

56515870 is a deficient number, since it is larger than the sum of its proper divisors (46607570).

56515870 is a wasteful number, since it uses less digits than its factorization.

56515870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77499.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 56515870 is about 7517.7037717644. The cubic root of 56515870 is about 383.7574377774.

The spelling of 56515870 in words is "fifty-six million, five hundred fifteen thousand, eight hundred seventy".