56255815 has 32 divisors (see below), whose sum is σ = 87837696. Its totient is φ = 33538560.

The previous prime is 56255809. The next prime is 56255831. The reversal of 56255815 is 51855265.

It is not a de Polignac number, because 56255815 - 2⁵ = 56255783 is a prime.

It is a Duffinian number.

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, 5679 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (2744928).

Almost surely, 2^56255815 is an apocalyptic number.

56255815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56255815 is a deficient number, since it is larger than the sum of its proper divisors (31581881).

56255815 is a wasteful number, since it uses less digits than its factorization.

56255815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6399.

The product of its digits is 60000, while the sum is 37.

The square root of 56255815 is about 7500.3876566482. The cubic root of 56255815 is about 383.1679189695.

The spelling of 56255815 in words is "fifty-six million, two hundred fifty-five thousand, eight hundred fifteen".