255655 has 4 divisors (see below), whose sum is σ = 306792. Its totient is φ = 204520.

The previous prime is 255653. The next prime is 255659. The reversal of 255655 is 556552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255655 - 2¹ = 255653 is a prime.

It is a Duffinian number.

255655 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255653) 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, 25561 + ... + 25570.

It is an arithmetic number, because the mean of its divisors is an integer number (76698).

2²⁵⁵⁶⁵⁵ is an apocalyptic number.

255655 is a deficient number, since it is larger than the sum of its proper divisors (51137).

255655 is an equidigital number, since it uses as much as digits as its factorization.

255655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51136.

The product of its digits is 7500, while the sum is 28.

The square root of 255655 is about 505.6233776241. The cubic root of 255655 is about 63.4675056431.

The spelling of 255655 in words is "two hundred fifty-five thousand, six hundred fifty-five".