255813969 has 4 divisors (see below), whose sum is σ = 341085296. Its totient is φ = 170542644.

The previous prime is 255813949. The next prime is 255813979. The reversal of 255813969 is 969318552.

It is a happy number.

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 not a de Polignac number, because 255813969 - 2⁸ = 255813713 is a prime.

It is a super-2 number, since 2×255813969² = 130881573471065922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255813949) 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, 42635659 + ... + 42635664.

It is an arithmetic number, because the mean of its divisors is an integer number (85271324).

Almost surely, 2^255813969 is an apocalyptic number.

It is an amenable number.

255813969 is a deficient number, since it is larger than the sum of its proper divisors (85271327).

255813969 is an equidigital number, since it uses as much as digits as its factorization.

255813969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85271326.

The product of its digits is 583200, while the sum is 48.

The square root of 255813969 is about 15994.1854747280. The cubic root of 255813969 is about 634.8065784095.

The spelling of 255813969 in words is "two hundred fifty-five million, eight hundred thirteen thousand, nine hundred sixty-nine".