255552809 has 8 divisors (see below), whose sum is σ = 264115200. Its totient is φ = 247010400.

The previous prime is 255552749. The next prime is 255552841. The reversal of 255552809 is 908255552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255552809 - 2²⁰ = 254504233 is a prime.

It is a super-3 number, since 3×255552809³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255522809) 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 7 ways as a sum of consecutive naturals, for example, 23717 + ... + 32765.

It is an arithmetic number, because the mean of its divisors is an integer number (33014400).

Almost surely, 2^255552809 is an apocalyptic number.

It is an amenable number.

255552809 is a deficient number, since it is larger than the sum of its proper divisors (8562391).

255552809 is an equidigital number, since it uses as much as digits as its factorization.

255552809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9991.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 255552809 is about 15986.0191730149. The cubic root of 255552809 is about 634.5904805741.

The spelling of 255552809 in words is "two hundred fifty-five million, five hundred fifty-two thousand, eight hundred nine".