56157915 has 24 divisors (see below), whose sum is σ = 98766864. Its totient is φ = 27227200.

The previous prime is 56157889. The next prime is 56157923. The reversal of 56157915 is 51975165.

It is not a de Polignac number, because 56157915 - 2¹¹ = 56155867 is a prime.

It is a super-2 number, since 2×56157915² = 6307422834294450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13656 + ... + 17285.

It is an arithmetic number, because the mean of its divisors is an integer number (4115286).

Almost surely, 2^56157915 is an apocalyptic number.

56157915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56157915 is a deficient number, since it is larger than the sum of its proper divisors (42608949).

56157915 is a wasteful number, since it uses less digits than its factorization.

56157915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30971 (or 30960 counting only the distinct ones).

The product of its digits is 47250, while the sum is 39.

The square root of 56157915 is about 7493.8584854533. The cubic root of 56157915 is about 382.9455187271.

It can be divided in two parts, 5615 and 7915, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 56157915 in words is "fifty-six million, one hundred fifty-seven thousand, nine hundred fifteen".