255811589 has 16 divisors (see below), whose sum is σ = 291876480. Its totient is φ = 221928960.

The previous prime is 255811579. The next prime is 255811607. The reversal of 255811589 is 985118552.

255811589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255811589 - 2⁸ = 255811333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255811519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143069 + ... + 144845.

It is an arithmetic number, because the mean of its divisors is an integer number (18242280).

Almost surely, 2^255811589 is an apocalyptic number.

It is an amenable number.

255811589 is a deficient number, since it is larger than the sum of its proper divisors (36064891).

255811589 is a wasteful number, since it uses less digits than its factorization.

255811589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380.

The product of its digits is 144000, while the sum is 44.

The square root of 255811589 is about 15994.1110725167. Note that the first 3 decimals coincide. The cubic root of 255811589 is about 634.8046097337.

The spelling of 255811589 in words is "two hundred fifty-five million, eight hundred eleven thousand, five hundred eighty-nine".