57291431 has 4 divisors (see below), whose sum is σ = 57306600. Its totient is φ = 57276264.

The previous prime is 57291427. The next prime is 57291457. The reversal of 57291431 is 13419275.

57291431 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 57291431 - 2² = 57291427 is a prime.

It is a super-2 number, since 2×57291431² = 6564616132055522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57291461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3080 + ... + 11138.

It is an arithmetic number, because the mean of its divisors is an integer number (14326650).

Almost surely, 2^57291431 is an apocalyptic number.

57291431 is a deficient number, since it is larger than the sum of its proper divisors (15169).

57291431 is an equidigital number, since it uses as much as digits as its factorization.

57291431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15168.

The product of its digits is 7560, while the sum is 32.

The square root of 57291431 is about 7569.1103176001. The cubic root of 57291431 is about 385.5048888448.

The spelling of 57291431 in words is "fifty-seven million, two hundred ninety-one thousand, four hundred thirty-one".