255563 has 8 divisors (see below), whose sum is σ = 318720. Its totient is φ = 199080.

The previous prime is 255551. The next prime is 255571. The reversal of 255563 is 365552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255563 - 2⁶ = 255499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255503) 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 7 ways as a sum of consecutive naturals, for example, 1583 + ... + 1736.

It is an arithmetic number, because the mean of its divisors is an integer number (39840).

2²⁵⁵⁵⁶³ is an apocalyptic number.

255563 is a deficient number, since it is larger than the sum of its proper divisors (63157).

255563 is a wasteful number, since it uses less digits than its factorization.

255563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337.

The product of its digits is 4500, while the sum is 26.

The square root of 255563 is about 505.5323926318. The cubic root of 255563 is about 63.4598915916.

It can be divided in two parts, 255 and 563, that added together give a palindrome (818).

The spelling of 255563 in words is "two hundred fifty-five thousand, five hundred sixty-three".