257285323 has 4 divisors (see below), whose sum is σ = 257362960. Its totient is φ = 257207688.

The previous prime is 257285317. The next prime is 257285339. The reversal of 257285323 is 323582752.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257285323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257285423) 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, 33615 + ... + 40552.

It is an arithmetic number, because the mean of its divisors is an integer number (64340740).

Almost surely, 2^257285323 is an apocalyptic number.

257285323 is a deficient number, since it is larger than the sum of its proper divisors (77637).

257285323 is an equidigital number, since it uses as much as digits as its factorization.

257285323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77636.

The product of its digits is 100800, while the sum is 37.

The square root of 257285323 is about 16040.1160531961. The cubic root of 257285323 is about 636.0213155244.

The spelling of 257285323 in words is "two hundred fifty-seven million, two hundred eighty-five thousand, three hundred twenty-three".