257512297 has 12 divisors (see below), whose sum is σ = 299930580. Its totient is φ = 220448256.

The previous prime is 257512279. The next prime is 257512303. The reversal of 257512297 is 792215752.

It can be written as a sum of positive squares in 2 ways, for example, as 13402921 + 244109376 = 3661^2 + 15624^2 .

It is not a de Polignac number, because 257512297 - 2²⁷ = 123294569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257512237) 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, 42693 + ... + 48349.

It is an arithmetic number, because the mean of its divisors is an integer number (24994215).

Almost surely, 2^257512297 is an apocalyptic number.

It is an amenable number.

257512297 is a deficient number, since it is larger than the sum of its proper divisors (42418283).

257512297 is an equidigital number, since it uses as much as digits as its factorization.

257512297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600 (or 6593 counting only the distinct ones).

The product of its digits is 88200, while the sum is 40.

The square root of 257512297 is about 16047.1896916563. The cubic root of 257512297 is about 636.2082906567.

The spelling of 257512297 in words is "two hundred fifty-seven million, five hundred twelve thousand, two hundred ninety-seven".