57512731 has 2 divisors, whose sum is σ = 57512732. Its totient is φ = 57512730.

The previous prime is 57512701. The next prime is 57512743. The reversal of 57512731 is 13721575.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57512731 - 2⁹ = 57512219 is a prime.

It is a super-2 number, since 2×57512731² = 6615428454156722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57512693 and 57512702.

It is not a weakly prime, because it can be changed into another prime (57512701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28756365 + 28756366.

It is an arithmetic number, because the mean of its divisors is an integer number (28756366).

Almost surely, 2^57512731 is an apocalyptic number.

57512731 is a deficient number, since it is larger than the sum of its proper divisors (1).

57512731 is an equidigital number, since it uses as much as digits as its factorization.

57512731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 57512731 is about 7583.7148548716. The cubic root of 57512731 is about 386.0006152281. Note that the first 3 decimals are identical.

The spelling of 57512731 in words is "fifty-seven million, five hundred twelve thousand, seven hundred thirty-one".