255539999 has 24 divisors (see below), whose sum is σ = 305077104. Its totient is φ = 212160000.

The previous prime is 255539993. The next prime is 255540007. The reversal of 255539999 is 999935552.

It is a de Polignac number, because none of the positive numbers 2^k-255539999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255539993) 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 23 ways as a sum of consecutive naturals, for example, 187079 + ... + 188439.

It is an arithmetic number, because the mean of its divisors is an integer number (12711546).

Almost surely, 2^255539999 is an apocalyptic number.

255539999 is a deficient number, since it is larger than the sum of its proper divisors (49537105).

255539999 is a wasteful number, since it uses less digits than its factorization.

255539999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1486 counting only the distinct ones).

The product of its digits is 4920750, while the sum is 56.

The square root of 255539999 is about 15985.6185053942. The cubic root of 255539999 is about 634.5798771037.

The spelling of 255539999 in words is "two hundred fifty-five million, five hundred thirty-nine thousand, nine hundred ninety-nine".