255439999 has 8 divisors (see below), whose sum is σ = 256701312. Its totient is φ = 254182680.

The previous prime is 255439967. The next prime is 255440023. The reversal of 255439999 is 999934552.

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

It is a cyclic number.

It is not a de Polignac number, because 255439999 - 2⁵ = 255439967 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 (255439949) 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, 262584 + ... + 263554.

It is an arithmetic number, because the mean of its divisors is an integer number (32087664).

Almost surely, 2^255439999 is an apocalyptic number.

255439999 is a deficient number, since it is larger than the sum of its proper divisors (1261313).

255439999 is an equidigital number, since it uses as much as digits as its factorization.

255439999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997.

The product of its digits is 3936600, while the sum is 55.

The square root of 255439999 is about 15982.4903879214. The cubic root of 255439999 is about 634.4970899766.

The spelling of 255439999 in words is "two hundred fifty-five million, four hundred thirty-nine thousand, nine hundred ninety-nine".