57257231 has 2 divisors, whose sum is σ = 57257232. Its totient is φ = 57257230.

The previous prime is 57257227. The next prime is 57257243. The reversal of 57257231 is 13275275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57257231 - 2² = 57257227 is a prime.

It is a super-2 number, since 2×57257231² = 6556781003574722, which contains 22 as substring.

It is equal to p_3408863 and since 57257231 and 3408863 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57257131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28628615 + 28628616.

It is an arithmetic number, because the mean of its divisors is an integer number (28628616).

Almost surely, 2^57257231 is an apocalyptic number.

57257231 is a deficient number, since it is larger than the sum of its proper divisors (1).

57257231 is an equidigital number, since it uses as much as digits as its factorization.

57257231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 32.

The square root of 57257231 is about 7566.8507980533. The cubic root of 57257231 is about 385.4281647968.

The spelling of 57257231 in words is "fifty-seven million, two hundred fifty-seven thousand, two hundred thirty-one".