255808623 has 16 divisors (see below), whose sum is σ = 403246080. Its totient is φ = 141135456.

The previous prime is 255808561. The next prime is 255808633. The reversal of 255808623 is 326808552.

It is not a de Polignac number, because 255808623 - 2¹³ = 255800431 is a prime.

It is a super-2 number, since 2×255808623² = 130876103202312258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255808633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209415 + ... + 210632.

It is an arithmetic number, because the mean of its divisors is an integer number (25202880).

Almost surely, 2^255808623 is an apocalyptic number.

255808623 is a deficient number, since it is larger than the sum of its proper divisors (147437457).

255808623 is a wasteful number, since it uses less digits than its factorization.

255808623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420086.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 255808623 is about 15994.0183506210. The cubic root of 255808623 is about 634.8021563164.

The spelling of 255808623 in words is "two hundred fifty-five million, eight hundred eight thousand, six hundred twenty-three".