255890257 has 8 divisors (see below), whose sum is σ = 297403200. Its totient is φ = 215616624.

The previous prime is 255890227. The next prime is 255890269. The reversal of 255890257 is 752098552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255890257 - 2¹⁹ = 255365969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255890227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309382 + ... + 310207.

It is an arithmetic number, because the mean of its divisors is an integer number (37175400).

Almost surely, 2^255890257 is an apocalyptic number.

It is an amenable number.

255890257 is a deficient number, since it is larger than the sum of its proper divisors (41512943).

255890257 is an equidigital number, since it uses as much as digits as its factorization.

255890257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619655.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 255890257 is about 15996.5701636320. The cubic root of 255890257 is about 634.8696754473.

The spelling of 255890257 in words is "two hundred fifty-five million, eight hundred ninety thousand, two hundred fifty-seven".