255559 has 4 divisors (see below), whose sum is σ = 262504. Its totient is φ = 248616.

The previous prime is 255551. The next prime is 255571. The reversal of 255559 is 955552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255559 - 2³ = 255551 is a prime.

It is a Duffinian number.

255559 is a lucky number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 255559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3417 + ... + 3490.

It is an arithmetic number, because the mean of its divisors is an integer number (65626).

2²⁵⁵⁵⁵⁹ is an apocalyptic number.

255559 is a deficient number, since it is larger than the sum of its proper divisors (6945).

255559 is an equidigital number, since it uses as much as digits as its factorization.

255559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944.

The product of its digits is 11250, while the sum is 31.

The square root of 255559 is about 505.5284363911. The cubic root of 255559 is about 63.4595605044.

The spelling of 255559 in words is "two hundred fifty-five thousand, five hundred fifty-nine".