57156530 has 16 divisors (see below), whose sum is σ = 103794264. Its totient is φ = 22659840.

The previous prime is 57156521. The next prime is 57156553. The reversal of 57156530 is 3565175.

57156530 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 4 ways, for example, as 33721249 + 23435281 = 5807^2 + 4841^2 .

It is a Curzon 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, 24161 + ... + 26420.

Almost surely, 2^57156530 is an apocalyptic number.

57156530 is a deficient number, since it is larger than the sum of its proper divisors (46637734).

57156530 is a wasteful number, since it uses less digits than its factorization.

57156530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50701.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 57156530 is about 7560.1937805853. The cubic root of 57156530 is about 385.2020752864.

The spelling of 57156530 in words is "fifty-seven million, one hundred fifty-six thousand, five hundred thirty".