57561515 has 12 divisors (see below), whose sum is σ = 75924912. Its totient is φ = 41862480.

The previous prime is 57561487. The next prime is 57561527. The reversal of 57561515 is 51516575.

It is a de Polignac number, because none of the positive numbers 2^k-57561515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46967 + ... + 48176.

It is an arithmetic number, because the mean of its divisors is an integer number (6327076).

Almost surely, 2^57561515 is an apocalyptic number.

57561515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

57561515 is a deficient number, since it is larger than the sum of its proper divisors (18363397).

57561515 is a wasteful number, since it uses less digits than its factorization.

57561515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95170 (or 95159 counting only the distinct ones).

The product of its digits is 26250, while the sum is 35.

The square root of 57561515 is about 7586.9305387620. The cubic root of 57561515 is about 386.1097234316.

The spelling of 57561515 in words is "fifty-seven million, five hundred sixty-one thousand, five hundred fifteen".