255426909 has 4 divisors (see below), whose sum is σ = 340569216. Its totient is φ = 170284604.

The previous prime is 255426881. The next prime is 255426931. The reversal of 255426909 is 909624552.

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 255426909 - 2⁵ = 255426877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255426959) 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, 42571149 + ... + 42571154.

It is an arithmetic number, because the mean of its divisors is an integer number (85142304).

Almost surely, 2^255426909 is an apocalyptic number.

It is an amenable number.

255426909 is a deficient number, since it is larger than the sum of its proper divisors (85142307).

255426909 is an equidigital number, since it uses as much as digits as its factorization.

255426909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85142306.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 255426909 is about 15982.0808720266. The cubic root of 255426909 is about 634.4862515425.

The spelling of 255426909 in words is "two hundred fifty-five million, four hundred twenty-six thousand, nine hundred nine".