255228757 has 4 divisors (see below), whose sum is σ = 291690016. Its totient is φ = 218767500.

The previous prime is 255228737. The next prime is 255228781. The reversal of 255228757 is 757822552.

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 255228757 - 2¹⁵ = 255195989 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 (255228737) 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, 18230619 + ... + 18230632.

It is an arithmetic number, because the mean of its divisors is an integer number (72922504).

Almost surely, 2^255228757 is an apocalyptic number.

It is an amenable number.

255228757 is a deficient number, since it is larger than the sum of its proper divisors (36461259).

255228757 is an equidigital number, since it uses as much as digits as its factorization.

255228757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36461258.

The product of its digits is 392000, while the sum is 43.

The square root of 255228757 is about 15975.8804765183. The cubic root of 255228757 is about 634.3221377388.

The spelling of 255228757 in words is "two hundred fifty-five million, two hundred twenty-eight thousand, seven hundred fifty-seven".