255593 has 4 divisors (see below), whose sum is σ = 275268. Its totient is φ = 235920.

The previous prime is 255589. The next prime is 255613. The reversal of 255593 is 395552.

255593 is nontrivially palindromic in base 7.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85849 + 169744 = 293^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 255593 - 2² = 255589 is a prime.

It is an Ulam number.

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 255593.

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 3 ways as a sum of consecutive naturals, for example, 9818 + ... + 9843.

It is an arithmetic number, because the mean of its divisors is an integer number (68817).

2²⁵⁵⁵⁹³ is an apocalyptic number.

It is an amenable number.

255593 is a deficient number, since it is larger than the sum of its proper divisors (19675).

255593 is a wasteful number, since it uses less digits than its factorization.

255593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19674.

The product of its digits is 6750, while the sum is 29.

The square root of 255593 is about 505.5620634502. The cubic root of 255593 is about 63.4623746352.

It can be divided in two parts, 255 and 593, that added together give a palindrome (848).

The spelling of 255593 in words is "two hundred fifty-five thousand, five hundred ninety-three".