57431140 has 24 divisors (see below), whose sum is σ = 129883320. Its totient is φ = 21205248.

The previous prime is 57431123. The next prime is 57431147. The reversal of 57431140 is 4113475.

It can be written as a sum of positive squares in 4 ways, for example, as 2166784 + 55264356 = 1472^2 + 7434^2 .

It is not an unprimeable number, because it can be changed into a prime (57431147) 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, 110185 + ... + 110704.

It is an arithmetic number, because the mean of its divisors is an integer number (5411805).

Almost surely, 2^57431140 is an apocalyptic number.

It is an amenable number.

57431140 is an abundant number, since it is smaller than the sum of its proper divisors (72452180).

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

57431140 is a wasteful number, since it uses less digits than its factorization.

57431140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220911 (or 220909 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 57431140 is about 7578.3335899128. Note that the first 3 decimals coincide. The cubic root of 57431140 is about 385.8179943221.

The spelling of 57431140 in words is "fifty-seven million, four hundred thirty-one thousand, one hundred forty".