257340165 has 16 divisors (see below), whose sum is σ = 421320768. Its totient is φ = 134055936.

The previous prime is 257340137. The next prime is 257340173. The reversal of 257340165 is 561043752.

It is not a de Polignac number, because 257340165 - 2⁵ = 257340133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198844 + ... + 200133.

It is an arithmetic number, because the mean of its divisors is an integer number (26332548).

Almost surely, 2^257340165 is an apocalyptic number.

It is an amenable number.

257340165 is a deficient number, since it is larger than the sum of its proper divisors (163980603).

257340165 is a wasteful number, since it uses less digits than its factorization.

257340165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399028.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 257340165 is about 16041.8254883913. The cubic root of 257340165 is about 636.0665029743.

The spelling of 257340165 in words is "two hundred fifty-seven million, three hundred forty thousand, one hundred sixty-five".