57208831 has 2 divisors, whose sum is σ = 57208832. Its totient is φ = 57208830.

The previous prime is 57208807. The next prime is 57208841. The reversal of 57208831 is 13880275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57208831 - 2⁵ = 57208799 is a prime.

It is a super-2 number, since 2×57208831² = 6545700688773122, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57208841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28604415 + 28604416.

It is an arithmetic number, because the mean of its divisors is an integer number (28604416).

Almost surely, 2^57208831 is an apocalyptic number.

57208831 is a deficient number, since it is larger than the sum of its proper divisors (1).

57208831 is an equidigital number, since it uses as much as digits as its factorization.

57208831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 57208831 is about 7563.6519618502. The cubic root of 57208831 is about 385.3195323344.

The spelling of 57208831 in words is "fifty-seven million, two hundred eight thousand, eight hundred thirty-one".