57266257 has 12 divisors (see below), whose sum is σ = 59764608. Its totient is φ = 54836600.

The previous prime is 57266219. The next prime is 57266263. The reversal of 57266257 is 75266275.

It is not a de Polignac number, because 57266257 - 2¹⁵ = 57233489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57266357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437082 + ... + 437212.

It is an arithmetic number, because the mean of its divisors is an integer number (4980384).

Almost surely, 2^57266257 is an apocalyptic number.

It is an amenable number.

57266257 is a deficient number, since it is larger than the sum of its proper divisors (2498351).

57266257 is an equidigital number, since it uses as much as digits as its factorization.

57266257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 249 counting only the distinct ones).

The product of its digits is 176400, while the sum is 40.

The square root of 57266257 is about 7567.4471917550. The cubic root of 57266257 is about 385.4484166309.

The spelling of 57266257 in words is "fifty-seven million, two hundred sixty-six thousand, two hundred fifty-seven".