255855 has 16 divisors (see below), whose sum is σ = 421344. Its totient is φ = 132480.

The previous prime is 255851. The next prime is 255859. The reversal of 255855 is 558552.

255855 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (255851) and next prime (255859).

It is not a de Polignac number, because 255855 - 2² = 255851 is a prime.

255855 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255855.

It is not an unprimeable number, because it can be changed into a prime (255851) 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, 325 + ... + 785.

It is an arithmetic number, because the mean of its divisors is an integer number (26334).

2²⁵⁵⁸⁵⁵ is an apocalyptic number.

255855 is a deficient number, since it is larger than the sum of its proper divisors (165489).

255855 is a wasteful number, since it uses less digits than its factorization.

255855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its digits is 10000, while the sum is 30.

The square root of 255855 is about 505.8211146245. The cubic root of 255855 is about 63.4840516296.

The spelling of 255855 in words is "two hundred fifty-five thousand, eight hundred fifty-five".