257152513 has 4 divisors (see below), whose sum is σ = 263132848. Its totient is φ = 251172180.

The previous prime is 257152487. The next prime is 257152531. The reversal of 257152513 is 315251752.

257152513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257152513 - 2⁵ = 257152481 is a prime.

It is a super-2 number, since 2×257152513² = 132254829884430338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257152583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990103 + ... + 2990188.

It is an arithmetic number, because the mean of its divisors is an integer number (65783212).

Almost surely, 2^257152513 is an apocalyptic number.

It is an amenable number.

257152513 is a deficient number, since it is larger than the sum of its proper divisors (5980335).

257152513 is an equidigital number, since it uses as much as digits as its factorization.

257152513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980334.

The product of its digits is 10500, while the sum is 31.

The square root of 257152513 is about 16035.9755861625. The cubic root of 257152513 is about 635.9118591843.

The spelling of 257152513 in words is "two hundred fifty-seven million, one hundred fifty-two thousand, five hundred thirteen".