56528815 has 16 divisors (see below), whose sum is σ = 78216768. Its totient is φ = 38416896.

The previous prime is 56528809. The next prime is 56528821. The reversal of 56528815 is 51882565.

It is an interprime number because it is at equal distance from previous prime (56528809) and next prime (56528821).

It is not a de Polignac number, because 56528815 - 2³ = 56528807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3192 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (4888548).

Almost surely, 2^56528815 is an apocalyptic number.

56528815 is a deficient number, since it is larger than the sum of its proper divisors (21687953).

56528815 is a wasteful number, since it uses less digits than its factorization.

56528815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14418.

The product of its digits is 96000, while the sum is 40.

The square root of 56528815 is about 7518.5646901520. The cubic root of 56528815 is about 383.7867355115.

The spelling of 56528815 in words is "fifty-six million, five hundred twenty-eight thousand, eight hundred fifteen".