257317323 has 8 divisors (see below), whose sum is σ = 361147200. Its totient is φ = 162516168.

The previous prime is 257317309. The next prime is 257317369. The reversal of 257317323 is 323713752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257317323 - 2¹⁰ = 257316299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257317303) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2257113 + ... + 2257226.

It is an arithmetic number, because the mean of its divisors is an integer number (45143400).

Almost surely, 2^257317323 is an apocalyptic number.

257317323 is a deficient number, since it is larger than the sum of its proper divisors (103829877).

257317323 is a wasteful number, since it uses less digits than its factorization.

257317323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514361.

The product of its digits is 26460, while the sum is 33.

The square root of 257317323 is about 16041.1135211992. The cubic root of 257317323 is about 636.0476829287.

The spelling of 257317323 in words is "two hundred fifty-seven million, three hundred seventeen thousand, three hundred twenty-three".