57505520 has 40 divisors (see below), whose sum is σ = 139517856. Its totient is φ = 22001408.

The previous prime is 57505499. The next prime is 57505523. The reversal of 57505520 is 2550575.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57505523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13787 + ... + 17466.

Almost surely, 2^57505520 is an apocalyptic number.

It is an amenable number.

57505520 is an abundant number, since it is smaller than the sum of its proper divisors (82012336).

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

57505520 is a wasteful number, since it uses less digits than its factorization.

57505520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31289 (or 31283 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 57505520 is about 7583.2394133378. The cubic root of 57505520 is about 385.9844821811.

The spelling of 57505520 in words is "fifty-seven million, five hundred five thousand, five hundred twenty".