255558399 has 8 divisors (see below), whose sum is σ = 360788400. Its totient is φ = 160350336.

The previous prime is 255558397. The next prime is 255558403. The reversal of 255558399 is 993855552.

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

It is not a de Polignac number, because 255558399 - 2¹ = 255558397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 5010949 = 255558399 / (2 + 5 + 5 + 5 + 5 + 8 + 3 + 9 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255558397) 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 7 ways as a sum of consecutive naturals, for example, 2505424 + ... + 2505525.

It is an arithmetic number, because the mean of its divisors is an integer number (45098550).

Almost surely, 2^255558399 is an apocalyptic number.

255558399 is a deficient number, since it is larger than the sum of its proper divisors (105230001).

255558399 is a wasteful number, since it uses less digits than its factorization.

255558399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010969.

The product of its digits is 2430000, while the sum is 51.

The square root of 255558399 is about 15986.1940123345. The cubic root of 255558399 is about 634.5951075824.

The spelling of 255558399 in words is "two hundred fifty-five million, five hundred fifty-eight thousand, three hundred ninety-nine".