257716255 has 4 divisors (see below), whose sum is σ = 309259512. Its totient is φ = 206173000.

The previous prime is 257716231. The next prime is 257716279. The reversal of 257716255 is 552617752.

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

It is an interprime number because it is at equal distance from previous prime (257716231) and next prime (257716279).

It is not a de Polignac number, because 257716255 - 2⁵ = 257716223 is a prime.

It is a Duffinian number.

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, 25771621 + ... + 25771630.

It is an arithmetic number, because the mean of its divisors is an integer number (77314878).

Almost surely, 2^257716255 is an apocalyptic number.

257716255 is a deficient number, since it is larger than the sum of its proper divisors (51543257).

257716255 is an equidigital number, since it uses as much as digits as its factorization.

257716255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51543256.

The product of its digits is 147000, while the sum is 40.

The square root of 257716255 is about 16053.5433783324. The cubic root of 257716255 is about 636.3762121232.

The spelling of 257716255 in words is "two hundred fifty-seven million, seven hundred sixteen thousand, two hundred fifty-five".