256550 has 24 divisors (see below), whose sum is σ = 546096. Its totient is φ = 87840.

The previous prime is 256541. The next prime is 256561. The reversal of 256550 is 55652.

256550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 256550.

It is an unprimeable number.

256550 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 11 ways as a sum of consecutive naturals, for example, 17 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (22754).

2²⁵⁶⁵⁵⁰ is an apocalyptic number.

256550 is an abundant number, since it is smaller than the sum of its proper divisors (289546).

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

256550 is a wasteful number, since it uses less digits than its factorization.

256550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 256550 is about 506.5076504852. The cubic root of 256550 is about 63.5414819786.

The spelling of 256550 in words is "two hundred fifty-six thousand, five hundred fifty".