255599 has 4 divisors (see below), whose sum is σ = 266736. Its totient is φ = 244464.

The previous prime is 255589. The next prime is 255613. The reversal of 255599 is 995552.

255599 is nontrivially palindromic in base 4.

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

It is a cyclic number.

It is not a de Polignac number, because 255599 - 2¹⁶ = 190063 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534 + ... + 5579.

It is an arithmetic number, because the mean of its divisors is an integer number (66684).

2²⁵⁵⁵⁹⁹ is an apocalyptic number.

255599 is a deficient number, since it is larger than the sum of its proper divisors (11137).

255599 is a wasteful number, since it uses less digits than its factorization.

255599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11136.

The product of its digits is 20250, while the sum is 35.

The square root of 255599 is about 505.5679974049. The cubic root of 255599 is about 63.4628712206.

The spelling of 255599 in words is "two hundred fifty-five thousand, five hundred ninety-nine".