57085591 has 2 divisors, whose sum is σ = 57085592. Its totient is φ = 57085590.

The previous prime is 57085577. The next prime is 57085603. The reversal of 57085591 is 19558075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57085591 - 2⁵ = 57085559 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57080591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28542795 + 28542796.

It is an arithmetic number, because the mean of its divisors is an integer number (28542796).

Almost surely, 2^57085591 is an apocalyptic number.

57085591 is a deficient number, since it is larger than the sum of its proper divisors (1).

57085591 is an equidigital number, since it uses as much as digits as its factorization.

57085591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 57085591 is about 7555.5007114023. The cubic root of 57085591 is about 385.0426466504.

The spelling of 57085591 in words is "fifty-seven million, eighty-five thousand, five hundred ninety-one".