257917312 has 16 divisors (see below), whose sum is σ = 513819900. Its totient is φ = 128958592.

The previous prime is 257917301. The next prime is 257917339. The reversal of 257917312 is 213719752.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007362 + ... + 1007617.

Almost surely, 2^257917312 is an apocalyptic number.

It is an amenable number.

257917312 is a deficient number, since it is larger than the sum of its proper divisors (255902588).

257917312 is an equidigital number, since it uses as much as digits as its factorization.

257917312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014993 (or 2014981 counting only the distinct ones).

The product of its digits is 26460, while the sum is 37.

The square root of 257917312 is about 16059.8042329289. The cubic root of 257917312 is about 636.5416584635.

It can be divided in two parts, 2579 and 17312, that added together give a palindrome (19891).

The spelling of 257917312 in words is "two hundred fifty-seven million, nine hundred seventeen thousand, three hundred twelve".