57257235 has 72 divisors (see below), whose sum is σ = 120575520. Its totient is φ = 25014528.

The previous prime is 57257231. The next prime is 57257243. The reversal of 57257235 is 53275275.

It is a happy number.

57257235 is a `hidden beast` number, since 57 + 2 + 572 + 35 = 666.

It is not a de Polignac number, because 57257235 - 2² = 57257231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57257235.

It is not an unprimeable number, because it can be changed into a prime (57257231) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 50151 + ... + 51279.

It is an arithmetic number, because the mean of its divisors is an integer number (1674660).

Almost surely, 2^57257235 is an apocalyptic number.

57257235 is an abundant number, since it is smaller than the sum of its proper divisors (63318285).

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

57257235 is a wasteful number, since it uses less digits than its factorization.

57257235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1167 counting only the distinct ones).

The product of its digits is 73500, while the sum is 36.

The square root of 57257235 is about 7566.8510623641. The cubic root of 57257235 is about 385.4281737722.

The spelling of 57257235 in words is "fifty-seven million, two hundred fifty-seven thousand, two hundred thirty-five".