57213112 has 32 divisors (see below), whose sum is σ = 117417600. Its totient is φ = 25919200.

The previous prime is 57213089. The next prime is 57213133. The reversal of 57213112 is 21131275.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent 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, 30687 + ... + 32497.

It is an arithmetic number, because the mean of its divisors is an integer number (3669300).

Almost surely, 2^57213112 is an apocalyptic number.

It is an amenable number.

57213112 is an abundant number, since it is smaller than the sum of its proper divisors (60204488).

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

57213112 is a wasteful number, since it uses less digits than its factorization.

57213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2183 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 57213112 is about 7563.9349547706. The cubic root of 57213112 is about 385.3291433901.

Adding to 57213112 its reverse (21131275), we get a palindrome (78344387).

The spelling of 57213112 in words is "fifty-seven million, two hundred thirteen thousand, one hundred twelve".