255330891 has 6 divisors (see below), whose sum is σ = 368811300. Its totient is φ = 170220588.

The previous prime is 255330863. The next prime is 255330899. The reversal of 255330891 is 198033552.

It is not a de Polignac number, because 255330891 - 2¹⁹ = 254806603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255330899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14185041 + ... + 14185058.

It is an arithmetic number, because the mean of its divisors is an integer number (61468550).

Almost surely, 2^255330891 is an apocalyptic number.

255330891 is a deficient number, since it is larger than the sum of its proper divisors (113480409).

255330891 is a wasteful number, since it uses less digits than its factorization.

255330891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28370105 (or 28370102 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 255330891 is about 15979.0766629364. The cubic root of 255330891 is about 634.4067379464.

The spelling of 255330891 in words is "two hundred fifty-five million, three hundred thirty thousand, eight hundred ninety-one".