257538323 has 4 divisors (see below), whose sum is σ = 294329520. Its totient is φ = 220747128.

The previous prime is 257538319. The next prime is 257538329. The reversal of 257538323 is 323835752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257538323 - 2² = 257538319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257538329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18395588 + ... + 18395601.

It is an arithmetic number, because the mean of its divisors is an integer number (73582380).

Almost surely, 2^257538323 is an apocalyptic number.

257538323 is a deficient number, since it is larger than the sum of its proper divisors (36791197).

257538323 is an equidigital number, since it uses as much as digits as its factorization.

257538323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36791196.

The product of its digits is 151200, while the sum is 38.

The square root of 257538323 is about 16048.0005919741. Note that the first 3 decimals coincide. The cubic root of 257538323 is about 636.2297231596.

The spelling of 257538323 in words is "two hundred fifty-seven million, five hundred thirty-eight thousand, three hundred twenty-three".