255171 has 16 divisors (see below), whose sum is σ = 403200. Its totient is φ = 140448.

The previous prime is 255149. The next prime is 255173. The reversal of 255171 is 171552.

It is not a de Polignac number, because 255171 - 2⁶ = 255107 is a prime.

It is a super-2 number, since 2×255171² = 130224478482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2²⁵⁵¹⁷¹ is an apocalyptic number.

255171 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

255171 is a deficient number, since it is larger than the sum of its proper divisors (148029).

255171 is a wasteful number, since it uses less digits than its factorization.

255171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

The product of its digits is 350, while the sum is 21.

The square root of 255171 is about 505.1445337723. The cubic root of 255171 is about 63.4274286146.

The spelling of 255171 in words is "two hundred fifty-five thousand, one hundred seventy-one".