57381312 has 28 divisors (see below), whose sum is σ = 151821896. Its totient is φ = 19127040.

The previous prime is 57381299. The next prime is 57381319. The reversal of 57381312 is 21318375.

It is a super-2 number, since 2×57381312² = 6585229933682688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57381312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57381319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149239 + ... + 149622.

Almost surely, 2^57381312 is an apocalyptic number.

It is an amenable number.

57381312 is an abundant number, since it is smaller than the sum of its proper divisors (94440584).

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

57381312 is a wasteful number, since it uses less digits than its factorization.

57381312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298876 (or 298866 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 57381312 is about 7575.0453463989. The cubic root of 57381312 is about 385.7063818094.

Adding to 57381312 its reverse (21318375), we get a palindrome (78699687).

The spelling of 57381312 in words is "fifty-seven million, three hundred eighty-one thousand, three hundred twelve".