257505316 has 24 divisors (see below), whose sum is σ = 454942656. Its totient is φ = 127527840.

The previous prime is 257505301. The next prime is 257505329. The reversal of 257505316 is 613505752.

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 in 7 ways as a sum of consecutive naturals, for example, 264711 + ... + 265681.

It is an arithmetic number, because the mean of its divisors is an integer number (18955944).

Almost surely, 2^257505316 is an apocalyptic number.

It is an amenable number.

257505316 is a deficient number, since it is larger than the sum of its proper divisors (197437340).

257505316 is a wasteful number, since it uses less digits than its factorization.

257505316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 257505316 is about 16046.9721754604. The cubic root of 257505316 is about 636.2025415329.

The spelling of 257505316 in words is "two hundred fifty-seven million, five hundred five thousand, three hundred sixteen".