255915593 has 4 divisors (see below), whose sum is σ = 255991680. Its totient is φ = 255839508.

The previous prime is 255915587. The next prime is 255915607. The reversal of 255915593 is 395519552.

255915593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 255915593 - 2⁸ = 255915337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255915193) 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, 32753 + ... + 39806.

It is an arithmetic number, because the mean of its divisors is an integer number (63997920).

Almost surely, 2^255915593 is an apocalyptic number.

It is an amenable number.

255915593 is a deficient number, since it is larger than the sum of its proper divisors (76087).

255915593 is an equidigital number, since it uses as much as digits as its factorization.

255915593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76086.

The product of its digits is 303750, while the sum is 44.

The square root of 255915593 is about 15997.3620637904. The cubic root of 255915593 is about 634.8906278241.

The spelling of 255915593 in words is "two hundred fifty-five million, nine hundred fifteen thousand, five hundred ninety-three".