257233136 has 40 divisors (see below), whose sum is σ = 508561200. Its totient is φ = 126019584.

The previous prime is 257233121. The next prime is 257233159. The reversal of 257233136 is 631332752.

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 7 ways as a sum of consecutive naturals, for example, 165290 + ... + 166838.

It is an arithmetic number, because the mean of its divisors is an integer number (12714030).

Almost surely, 2^257233136 is an apocalyptic number.

It is an amenable number.

257233136 is a deficient number, since it is larger than the sum of its proper divisors (251328064).

257233136 is a wasteful number, since it uses less digits than its factorization.

257233136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1755 counting only the distinct ones).

The product of its digits is 22680, while the sum is 32.

The square root of 257233136 is about 16038.4892056577. The cubic root of 257233136 is about 635.9783097174.

Adding to 257233136 its reverse (631332752), we get a palindrome (888565888).

The spelling of 257233136 in words is "two hundred fifty-seven million, two hundred thirty-three thousand, one hundred thirty-six".