255555559 has 16 divisors (see below), whose sum is σ = 305633088. Its totient is φ = 209094912.

The previous prime is 255555533. The next prime is 255555647. The reversal of 255555559 is 955555552.

It is a cyclic number.

It is not a de Polignac number, because 255555559 - 2²⁷ = 121337831 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255555959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4419 + ... + 23035.

It is an arithmetic number, because the mean of its divisors is an integer number (19102068).

Almost surely, 2^255555559 is an apocalyptic number.

255555559 is a deficient number, since it is larger than the sum of its proper divisors (50077529).

255555559 is a wasteful number, since it uses less digits than its factorization.

255555559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18714.

The product of its digits is 1406250, while the sum is 46.

The square root of 255555559 is about 15986.1051854415. The cubic root of 255555559 is about 634.5927568388.

The spelling of 255555559 in words is "two hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-nine".