57511812 has 48 divisors (see below), whose sum is σ = 138200832. Its totient is φ = 18604320.

The previous prime is 57511793. The next prime is 57511813. The reversal of 57511812 is 21811575.

It is a self number, because there is not a number n which added to its sum of digits gives 57511812.

It is not an unprimeable number, because it can be changed into a prime (57511813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116887 + ... + 117377.

It is an arithmetic number, because the mean of its divisors is an integer number (2879184).

Almost surely, 2^57511812 is an apocalyptic number.

It is an amenable number.

57511812 is an abundant number, since it is smaller than the sum of its proper divisors (80689020).

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

57511812 is a wasteful number, since it uses less digits than its factorization.

57511812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 766 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 57511812 is about 7583.6542642713. The cubic root of 57511812 is about 385.9985592401.

The spelling of 57511812 in words is "fifty-seven million, five hundred eleven thousand, eight hundred twelve".