255863 has 4 divisors (see below), whose sum is σ = 256968. Its totient is φ = 254760.

The previous prime is 255859. The next prime is 255869. The reversal of 255863 is 368552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 255863 - 2² = 255859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (64242).

2²⁵⁵⁸⁶³ is an apocalyptic number.

255863 is a deficient number, since it is larger than the sum of its proper divisors (1105).

255863 is an equidigital number, since it uses as much as digits as its factorization.

255863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 7200, while the sum is 29.

The square root of 255863 is about 505.8290224967. The cubic root of 255863 is about 63.4847132897.

The spelling of 255863 in words is "two hundred fifty-five thousand, eight hundred sixty-three".