57551257 has 2 divisors, whose sum is σ = 57551258. Its totient is φ = 57551256.

The previous prime is 57551213. The next prime is 57551261. The reversal of 57551257 is 75215575.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38576521 + 18974736 = 6211^2 + 4356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57551257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57551357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28775628 + 28775629.

It is an arithmetic number, because the mean of its divisors is an integer number (28775629).

Almost surely, 2^57551257 is an apocalyptic number.

It is an amenable number.

57551257 is a deficient number, since it is larger than the sum of its proper divisors (1).

57551257 is an equidigital number, since it uses as much as digits as its factorization.

57551257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61250, while the sum is 37.

The square root of 57551257 is about 7586.2544776721. The cubic root of 57551257 is about 386.0867859484.

The spelling of 57551257 in words is "fifty-seven million, five hundred fifty-one thousand, two hundred fifty-seven".