255109 has 4 divisors (see below), whose sum is σ = 256204. Its totient is φ = 254016.

The previous prime is 255107. The next prime is 255121. The reversal of 255109 is 901552.

255109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 112225 + 142884 = 335^2 + 378^2 .

It is a 4-Lehmer number, since φ(255109) divides (255109-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 255109 - 2¹ = 255107 is a prime.

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 255109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255107) 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, 42 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (64051).

2²⁵⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

255109 is a deficient number, since it is larger than the sum of its proper divisors (1095).

255109 is an equidigital number, since it uses as much as digits as its factorization.

255109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 255109 is about 505.0831614695. The cubic root of 255109 is about 63.4222911197.

The spelling of 255109 in words is "two hundred fifty-five thousand, one hundred nine".