257999163 has 12 divisors (see below), whose sum is σ = 348218280. Its totient is φ = 169893856.

The previous prime is 257999117. The next prime is 257999197. The reversal of 257999163 is 361999752.

It is a happy number.

257999163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 257999163 - 2⁸ = 257998907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257999563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261970 + ... + 262952.

It is an arithmetic number, because the mean of its divisors is an integer number (29018190).

Almost surely, 2^257999163 is an apocalyptic number.

257999163 is a deficient number, since it is larger than the sum of its proper divisors (90219117).

257999163 is an frugal number, since it uses more digits than its factorization.

257999163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 1075 counting only the distinct ones).

The product of its digits is 918540, while the sum is 51.

The square root of 257999163 is about 16062.3523495159. The cubic root of 257999163 is about 636.6089876142.

The spelling of 257999163 in words is "two hundred fifty-seven million, nine hundred ninety-nine thousand, one hundred sixty-three".