255181 has 2 divisors, whose sum is σ = 255182. Its totient is φ = 255180.

The previous prime is 255179. The next prime is 255191. The reversal of 255181 is 181552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217156 + 38025 = 466^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 255181 - 2¹ = 255179 is a prime.

It is a super-2 number, since 2×255181² = 130234685522, which contains 22 as substring.

Together with 255179, it forms a pair of twin primes.

It is a Chen prime.

255181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127590 + 127591.

It is an arithmetic number, because the mean of its divisors is an integer number (127591).

2²⁵⁵¹⁸¹ is an apocalyptic number.

It is an amenable number.

255181 is a deficient number, since it is larger than the sum of its proper divisors (1).

255181 is an equidigital number, since it uses as much as digits as its factorization.

255181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 22.

The square root of 255181 is about 505.1544318325. The cubic root of 255181 is about 63.4282571649.

The spelling of 255181 in words is "two hundred fifty-five thousand, one hundred eighty-one".