255810 has 16 divisors (see below), whose sum is σ = 614016. Its totient is φ = 68208.

The previous prime is 255803. The next prime is 255839. The reversal of 255810 is 18552.

It is a super-2 number, since 2×255810² = 130877512200, which contains 22 as substring.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255810.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4234 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (38376).

2²⁵⁵⁸¹⁰ is an apocalyptic number.

255810 is an abundant number, since it is smaller than the sum of its proper divisors (358206).

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

255810 is a wasteful number, since it uses less digits than its factorization.

255810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8537.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 255810 is about 505.7766305396. The cubic root of 255810 is about 63.4803295346.

The spelling of 255810 in words is "two hundred fifty-five thousand, eight hundred ten".