257513255 has 4 divisors (see below), whose sum is σ = 309015912. Its totient is φ = 206010600.

The previous prime is 257513239. The next prime is 257513261. The reversal of 257513255 is 552315752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257513255 - 2⁴ = 257513239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25751321 + ... + 25751330.

It is an arithmetic number, because the mean of its divisors is an integer number (77253978).

Almost surely, 2^257513255 is an apocalyptic number.

257513255 is a deficient number, since it is larger than the sum of its proper divisors (51502657).

257513255 is an equidigital number, since it uses as much as digits as its factorization.

257513255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51502656.

The product of its digits is 52500, while the sum is 35.

The square root of 257513255 is about 16047.2195410918. The cubic root of 257513255 is about 636.2090795987.

The spelling of 257513255 in words is "two hundred fifty-seven million, five hundred thirteen thousand, two hundred fifty-five".