257163375 has 32 divisors (see below), whose sum is σ = 489056256. Its totient is φ = 117559200.

The previous prime is 257163341. The next prime is 257163409. The reversal of 257163375 is 573361752.

It is an interprime number because it is at equal distance from previous prime (257163341) and next prime (257163409).

It is not a de Polignac number, because 257163375 - 2¹¹ = 257161327 is a prime.

It is a super-2 number, since 2×257163375² = 132266002882781250, which contains 22 as substring.

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 in 31 ways as a sum of consecutive naturals, for example, 46359 + ... + 51608.

It is an arithmetic number, because the mean of its divisors is an integer number (15283008).

Almost surely, 2^257163375 is an apocalyptic number.

257163375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257163375 is a deficient number, since it is larger than the sum of its proper divisors (231892881).

257163375 is an equidigital number, since it uses as much as digits as its factorization.

257163375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97992 (or 97982 counting only the distinct ones).

The product of its digits is 132300, while the sum is 39.

The square root of 257163375 is about 16036.3142585820. The cubic root of 257163375 is about 635.9208125965.

The spelling of 257163375 in words is "two hundred fifty-seven million, one hundred sixty-three thousand, three hundred seventy-five".