57133530 has 24 divisors (see below), whose sum is σ = 148547412. Its totient is φ = 15235584.

The previous prime is 57133519. The next prime is 57133537. The reversal of 57133530 is 3533175.

It can be written as a sum of positive squares in 2 ways, for example, as 57108249 + 25281 = 7557^2 + 159^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 57133494 and 57133503.

It is not an unprimeable number, because it can be changed into a prime (57133537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317319 + ... + 317498.

Almost surely, 2^57133530 is an apocalyptic number.

57133530 is an abundant number, since it is smaller than the sum of its proper divisors (91413882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57133530 is a wasteful number, since it uses less digits than its factorization.

57133530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634830 (or 634827 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 27.

The square root of 57133530 is about 7558.6725024967. The cubic root of 57133530 is about 385.1503994389.

The spelling of 57133530 in words is "fifty-seven million, one hundred thirty-three thousand, five hundred thirty".