257164423 has 12 divisors (see below), whose sum is σ = 279126000. Its totient is φ = 236107520.

The previous prime is 257164379. The next prime is 257164429. The reversal of 257164423 is 324461752.

It is not a de Polignac number, because 257164423 - 2¹³ = 257156231 is a prime.

It is a super-2 number, since 2×257164423² = 132267080913845858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257164429) 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, 24078 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (23260500).

Almost surely, 2^257164423 is an apocalyptic number.

257164423 is a deficient number, since it is larger than the sum of its proper divisors (21961577).

257164423 is an equidigital number, since it uses as much as digits as its factorization.

257164423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9098 (or 9057 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 257164423 is about 16036.3469343863. The cubic root of 257164423 is about 635.9216764366.

The spelling of 257164423 in words is "two hundred fifty-seven million, one hundred sixty-four thousand, four hundred twenty-three".