255888917 has 4 divisors (see below), whose sum is σ = 258972000. Its totient is φ = 252805836.

The previous prime is 255888901. The next prime is 255888937. The reversal of 255888917 is 719888552.

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 255888917 - 2⁴ = 255888901 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 (255888937) 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, 1541417 + ... + 1541582.

It is an arithmetic number, because the mean of its divisors is an integer number (64743000).

Almost surely, 2^255888917 is an apocalyptic number.

It is an amenable number.

255888917 is a deficient number, since it is larger than the sum of its proper divisors (3083083).

255888917 is an equidigital number, since it uses as much as digits as its factorization.

255888917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083082.

The product of its digits is 1612800, while the sum is 53.

The square root of 255888917 is about 15996.5282795987. The cubic root of 255888917 is about 634.8685672550.

The spelling of 255888917 in words is "two hundred fifty-five million, eight hundred eighty-eight thousand, nine hundred seventeen".