56757257 has 2 divisors, whose sum is σ = 56757258. Its totient is φ = 56757256.

The previous prime is 56757209. The next prime is 56757269. The reversal of 56757257 is 75275765.

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., 53743561 + 3013696 = 7331^2 + 1736^2 .

It is a cyclic number.

It is not a de Polignac number, because 56757257 - 2⁶ = 56757193 is a prime.

It is not a weakly prime, because it can be changed into another prime (56757277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28378628 + 28378629.

It is an arithmetic number, because the mean of its divisors is an integer number (28378629).

Almost surely, 2^56757257 is an apocalyptic number.

It is an amenable number.

56757257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56757257 is an equidigital number, since it uses as much as digits as its factorization.

56757257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 514500, while the sum is 44.

The square root of 56757257 is about 7533.7412352695. The cubic root of 56757257 is about 384.3030219024.

The spelling of 56757257 in words is "fifty-six million, seven hundred fifty-seven thousand, two hundred fifty-seven".