257231315 has 16 divisors (see below), whose sum is σ = 339171840. Its totient is φ = 185725920.

The previous prime is 257231297. The next prime is 257231321. The reversal of 257231315 is 513132752.

It is not a de Polignac number, because 257231315 - 2¹⁰ = 257230291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9179 + ... + 24468.

It is an arithmetic number, because the mean of its divisors is an integer number (21198240).

Almost surely, 2^257231315 is an apocalyptic number.

257231315 is a deficient number, since it is larger than the sum of its proper divisors (81940525).

257231315 is a wasteful number, since it uses less digits than its factorization.

257231315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33802.

The product of its digits is 6300, while the sum is 29.

The square root of 257231315 is about 16038.4324358710. The cubic root of 257231315 is about 635.9768089786.

The spelling of 257231315 in words is "two hundred fifty-seven million, two hundred thirty-one thousand, three hundred fifteen".