57021131 has 2 divisors, whose sum is σ = 57021132. Its totient is φ = 57021130.

The previous prime is 57021127. The next prime is 57021161. The reversal of 57021131 is 13112075.

57021131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57021131 - 2² = 57021127 is a prime.

It is a super-2 number, since 2×57021131² = 6502818761038322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57021161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28510565 + 28510566.

It is an arithmetic number, because the mean of its divisors is an integer number (28510566).

Almost surely, 2^57021131 is an apocalyptic number.

57021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

57021131 is an equidigital number, since it uses as much as digits as its factorization.

57021131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 57021131 is about 7551.2337402573. The cubic root of 57021131 is about 384.8976643734.

The spelling of 57021131 in words is "fifty-seven million, twenty-one thousand, one hundred thirty-one".