56757517 has 2 divisors, whose sum is σ = 56757518. Its totient is φ = 56757516.

The previous prime is 56757479. The next prime is 56757539. The reversal of 56757517 is 71575765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 2499561 = 7366^2 + 1581^2 .

It is a cyclic number.

It is not a de Polignac number, because 56757517 - 2¹⁵ = 56724749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56757557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28378758 + 28378759.

It is an arithmetic number, because the mean of its divisors is an integer number (28378759).

Almost surely, 2^56757517 is an apocalyptic number.

It is an amenable number.

56757517 is a deficient number, since it is larger than the sum of its proper divisors (1).

56757517 is an equidigital number, since it uses as much as digits as its factorization.

56757517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 257250, while the sum is 43.

The square root of 56757517 is about 7533.7584909526. The cubic root of 56757517 is about 384.3036087209.

The spelling of 56757517 in words is "fifty-six million, seven hundred fifty-seven thousand, five hundred seventeen".