257323233 has 16 divisors (see below), whose sum is σ = 346127040. Its totient is φ = 170041344.

The previous prime is 257323229. The next prime is 257323259. The reversal of 257323233 is 332323752.

It is not a de Polignac number, because 257323233 - 2² = 257323229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257323233.

It is not an unprimeable number, because it can be changed into a prime (257323733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203758 + ... + 205016.

It is an arithmetic number, because the mean of its divisors is an integer number (21632940).

Almost surely, 2^257323233 is an apocalyptic number.

It is an amenable number.

257323233 is a deficient number, since it is larger than the sum of its proper divisors (88803807).

257323233 is a wasteful number, since it uses less digits than its factorization.

257323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808.

The product of its digits is 22680, while the sum is 30.

The square root of 257323233 is about 16041.2977342857. The cubic root of 257323233 is about 636.0525524195.

Adding to 257323233 its reverse (332323752), we get a palindrome (589646985).

The spelling of 257323233 in words is "two hundred fifty-seven million, three hundred twenty-three thousand, two hundred thirty-three".