255311 has 4 divisors (see below), whose sum is σ = 291792. Its totient is φ = 218832.

The previous prime is 255259. The next prime is 255313. The reversal of 255311 is 113552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255311 - 2⁶ = 255247 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 5 + 3¹¹ + 5⁷ + 1 + 1 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255313) 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, 18230 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (72948).

2²⁵⁵³¹¹ is an apocalyptic number.

255311 is a deficient number, since it is larger than the sum of its proper divisors (36481).

255311 is an equidigital number, since it uses as much as digits as its factorization.

255311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36480.

The product of its digits is 150, while the sum is 17.

The square root of 255311 is about 505.2830889709. The cubic root of 255311 is about 63.4390263491.

Adding to 255311 its reverse (113552), we get a palindrome (368863).

The spelling of 255311 in words is "two hundred fifty-five thousand, three hundred eleven".