257488295 has 4 divisors (see below), whose sum is σ = 308985960. Its totient is φ = 205990632.

The previous prime is 257488279. The next prime is 257488333. The reversal of 257488295 is 592884752.

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

It is a cyclic number.

It is not a de Polignac number, because 257488295 - 2⁴ = 257488279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25748825 + ... + 25748834.

It is an arithmetic number, because the mean of its divisors is an integer number (77246490).

Almost surely, 2^257488295 is an apocalyptic number.

257488295 is a deficient number, since it is larger than the sum of its proper divisors (51497665).

257488295 is an equidigital number, since it uses as much as digits as its factorization.

257488295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51497664.

The product of its digits is 1612800, while the sum is 50.

The square root of 257488295 is about 16046.4418174248. The cubic root of 257488295 is about 636.1885236449.

It can be divided in two parts, 25748 and 8295, that added together give a palindrome (34043).

The spelling of 257488295 in words is "two hundred fifty-seven million, four hundred eighty-eight thousand, two hundred ninety-five".