255249957 has 4 divisors (see below), whose sum is σ = 340333280. Its totient is φ = 170166636.

The previous prime is 255249941. The next prime is 255249991. The reversal of 255249957 is 759942552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255249957 - 2⁴ = 255249941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255249457) 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, 42541657 + ... + 42541662.

It is an arithmetic number, because the mean of its divisors is an integer number (85083320).

Almost surely, 2^255249957 is an apocalyptic number.

It is an amenable number.

255249957 is a deficient number, since it is larger than the sum of its proper divisors (85083323).

255249957 is an equidigital number, since it uses as much as digits as its factorization.

255249957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85083322.

The product of its digits is 1134000, while the sum is 48.

The square root of 255249957 is about 15976.5439629477. The cubic root of 255249957 is about 634.3397000976.

The spelling of 255249957 in words is "two hundred fifty-five million, two hundred forty-nine thousand, nine hundred fifty-seven".