255771257 has 4 divisors (see below), whose sum is σ = 292310016. Its totient is φ = 219232500.

The previous prime is 255771253. The next prime is 255771337. The reversal of 255771257 is 752177552.

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 a cyclic number.

It is not a de Polignac number, because 255771257 - 2² = 255771253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255771253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18269369 + ... + 18269382.

It is an arithmetic number, because the mean of its divisors is an integer number (73077504).

Almost surely, 2^255771257 is an apocalyptic number.

It is an amenable number.

255771257 is a deficient number, since it is larger than the sum of its proper divisors (36538759).

255771257 is an equidigital number, since it uses as much as digits as its factorization.

255771257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36538758.

The product of its digits is 171500, while the sum is 41.

The square root of 255771257 is about 15992.8501837540. The cubic root of 255771257 is about 634.7712462658.

The spelling of 255771257 in words is "two hundred fifty-five million, seven hundred seventy-one thousand, two hundred fifty-seven".