57131900 has 72 divisors (see below), whose sum is σ = 150052896. Its totient is φ = 18432000.

The previous prime is 57131897. The next prime is 57131909. The reversal of 57131900 is 913175.

It is a super-2 number, since 2×57131900² = 6528107995220000, 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 57131900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57131909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9500 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (2084068).

Almost surely, 2^57131900 is an apocalyptic number.

57131900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57131900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75026448).

57131900 is an abundant number, since it is smaller than the sum of its proper divisors (92920996).

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

57131900 is a wasteful number, since it uses less digits than its factorization.

57131900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 57131900 is about 7558.5646785617. The cubic root of 57131900 is about 385.1467366679.

The spelling of 57131900 in words is "fifty-seven million, one hundred thirty-one thousand, nine hundred".