57986531 has 2 divisors, whose sum is σ = 57986532. Its totient is φ = 57986530.

The previous prime is 57986527. The next prime is 57986543. The reversal of 57986531 is 13568975.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57986531 - 2² = 57986527 is a prime.

It is a super-2 number, since 2×57986531² = 6724875554827922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57986501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28993265 + 28993266.

It is an arithmetic number, because the mean of its divisors is an integer number (28993266).

Almost surely, 2^57986531 is an apocalyptic number.

57986531 is a deficient number, since it is larger than the sum of its proper divisors (1).

57986531 is an equidigital number, since it uses as much as digits as its factorization.

57986531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 57986531 is about 7614.8887713479. Note that the first 3 decimals coincide. The cubic root of 57986531 is about 387.0576980434.

The spelling of 57986531 in words is "fifty-seven million, nine hundred eighty-six thousand, five hundred thirty-one".