57491457431 has 2 divisors, whose sum is σ = 57491457432. Its totient is φ = 57491457430.

The previous prime is 57491457323. The next prime is 57491457503. The reversal of 57491457431 is 13475419475.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57491457431 is a prime.

It is a super-2 number, since 2×57491457431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57491457431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57491457631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28745728715 + 28745728716.

It is an arithmetic number, because the mean of its divisors is an integer number (28745728716).

Almost surely, 2^57491457431 is an apocalyptic number.

57491457431 is a deficient number, since it is larger than the sum of its proper divisors (1).

57491457431 is an equidigital number, since it uses as much as digits as its factorization.

57491457431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 50.

The spelling of 57491457431 in words is "fifty-seven billion, four hundred ninety-one million, four hundred fifty-seven thousand, four hundred thirty-one".