57431551 has 2 divisors, whose sum is σ = 57431552. Its totient is φ = 57431550.

The previous prime is 57431537. The next prime is 57431567. The reversal of 57431551 is 15513475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57431551 - 2¹¹ = 57429503 is a prime.

It is a Chen prime.

It is equal to p_3418663 and since 57431551 and 3418663 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57431351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28715775 + 28715776.

It is an arithmetic number, because the mean of its divisors is an integer number (28715776).

Almost surely, 2^57431551 is an apocalyptic number.

57431551 is a deficient number, since it is larger than the sum of its proper divisors (1).

57431551 is an equidigital number, since it uses as much as digits as its factorization.

57431551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 57431551 is about 7578.3607066436. The cubic root of 57431551 is about 385.8189146754.

The spelling of 57431551 in words is "fifty-seven million, four hundred thirty-one thousand, five hundred fifty-one".