255951 has 6 divisors (see below), whose sum is σ = 369720. Its totient is φ = 170628.

The previous prime is 255947. The next prime is 255961. The reversal of 255951 is 159552.

It is not a de Polignac number, because 255951 - 2² = 255947 is a prime.

255951 is a lucky number.

It is a zygodrome in base 2 and base 3.

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 255951.

It is not an unprimeable number, because it can be changed into a prime (255961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14211 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (61620).

2²⁵⁵⁹⁵¹ is an apocalyptic number.

255951 is a deficient number, since it is larger than the sum of its proper divisors (113769).

255951 is a wasteful number, since it uses less digits than its factorization.

255951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28445 (or 28442 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 255951 is about 505.9160009330. The cubic root of 255951 is about 63.4919906405.

The spelling of 255951 in words is "two hundred fifty-five thousand, nine hundred fifty-one".