57137081 has 2 divisors, whose sum is σ = 57137082. Its totient is φ = 57137080.

The previous prime is 57137063. The next prime is 57137141. The reversal of 57137081 is 18073175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56866681 + 270400 = 7541^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57137081 is a prime.

It is a super-2 number, since 2×57137081² = 6529292050401122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57137281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28568540 + 28568541.

It is an arithmetic number, because the mean of its divisors is an integer number (28568541).

Almost surely, 2^57137081 is an apocalyptic number.

It is an amenable number.

57137081 is a deficient number, since it is larger than the sum of its proper divisors (1).

57137081 is an equidigital number, since it uses as much as digits as its factorization.

57137081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 57137081 is about 7558.9073945908. The cubic root of 57137081 is about 385.1583786456.

The spelling of 57137081 in words is "fifty-seven million, one hundred thirty-seven thousand, eighty-one".