57831881 has 2 divisors, whose sum is σ = 57831882. Its totient is φ = 57831880.

The previous prime is 57831847. The next prime is 57831919. The reversal of 57831881 is 18813875.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 13808656 = 6635^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 57831881 - 2¹⁸ = 57569737 is a prime.

It is a super-2 number, since 2×57831881² = 6689052919996322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57831811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28915940 + 28915941.

It is an arithmetic number, because the mean of its divisors is an integer number (28915941).

Almost surely, 2^57831881 is an apocalyptic number.

It is an amenable number.

57831881 is a deficient number, since it is larger than the sum of its proper divisors (1).

57831881 is an equidigital number, since it uses as much as digits as its factorization.

57831881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 41.

The square root of 57831881 is about 7604.7275427855. The cubic root of 57831881 is about 386.7132975702.

The spelling of 57831881 in words is "fifty-seven million, eight hundred thirty-one thousand, eight hundred eighty-one".