255556 has 12 divisors (see below), whose sum is σ = 511168. Its totient is φ = 109512.

The previous prime is 255551. The next prime is 255571. The reversal of 255556 is 655552.

255556 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

255556 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 9127 = 255556 / (2 + 5 + 5 + 5 + 5 + 6).

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 (255551) by changing a digit.

255556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4536 + ... + 4591.

2²⁵⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

255556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255556 is a wasteful number, since it uses less digits than its factorization.

255556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138 (or 9136 counting only the distinct ones).

The product of its digits is 7500, while the sum is 28.

The square root of 255556 is about 505.5254691902. The cubic root of 255556 is about 63.4593121867.

The spelling of 255556 in words is "two hundred fifty-five thousand, five hundred fifty-six".