255161 has 4 divisors (see below), whose sum is σ = 263424. Its totient is φ = 246900.

The previous prime is 255149. The next prime is 255173. The reversal of 255161 is 161552.

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 an interprime number because it is at equal distance from previous prime (255149) and next prime (255173).

It is a cyclic number.

It is not a de Polignac number, because 255161 - 2⁶ = 255097 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255161.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 4085 + ... + 4146.

It is an arithmetic number, because the mean of its divisors is an integer number (65856).

2²⁵⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

255161 is a deficient number, since it is larger than the sum of its proper divisors (8263).

255161 is an equidigital number, since it uses as much as digits as its factorization.

255161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8262.

The product of its digits is 300, while the sum is 20.

The square root of 255161 is about 505.1346355181. The cubic root of 255161 is about 63.4266000427.

The spelling of 255161 in words is "two hundred fifty-five thousand, one hundred sixty-one".