57172331 has 2 divisors, whose sum is σ = 57172332. Its totient is φ = 57172330.

The previous prime is 57172307. The next prime is 57172391. The reversal of 57172331 is 13327175.

57172331 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 a de Polignac number, because none of the positive numbers 2^k-57172331 is a prime.

It is a super-3 number, since 3×57172331³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 57172294 and 57172303.

It is not a weakly prime, because it can be changed into another prime (57172301) 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, 28586165 + 28586166.

It is an arithmetic number, because the mean of its divisors is an integer number (28586166).

Almost surely, 2^57172331 is an apocalyptic number.

57172331 is a deficient number, since it is larger than the sum of its proper divisors (1).

57172331 is an equidigital number, since it uses as much as digits as its factorization.

57172331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 57172331 is about 7561.2387212678. The cubic root of 57172331 is about 385.2375685608.

The spelling of 57172331 in words is "fifty-seven million, one hundred seventy-two thousand, three hundred thirty-one".