255081 has 4 divisors (see below), whose sum is σ = 340112. Its totient is φ = 170052.

The previous prime is 255077. The next prime is 255083. The reversal of 255081 is 180552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255081 - 2² = 255077 is a prime.

It is a super-2 number, since 2×255081² = 130132633122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255083) 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, 42511 + ... + 42516.

It is an arithmetic number, because the mean of its divisors is an integer number (85028).

2²⁵⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

255081 is a deficient number, since it is larger than the sum of its proper divisors (85031).

255081 is an equidigital number, since it uses as much as digits as its factorization.

255081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85030.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 255081 is about 505.0554425011. The cubic root of 255081 is about 63.4199706879.

Subtracting from 255081 its reverse (180552), we obtain a square (74529 = 273²).

The spelling of 255081 in words is "two hundred fifty-five thousand, eighty-one".