255319999 has 16 divisors (see below), whose sum is σ = 288276480. Its totient is φ = 224028000.

The previous prime is 255319951. The next prime is 255320003. The reversal of 255319999 is 999913552.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255319999 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 (255319919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172834 + ... + 174304.

It is an arithmetic number, because the mean of its divisors is an integer number (18017280).

Almost surely, 2^255319999 is an apocalyptic number.

255319999 is a deficient number, since it is larger than the sum of its proper divisors (32956481).

255319999 is a wasteful number, since it uses less digits than its factorization.

255319999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022.

The product of its digits is 984150, while the sum is 52.

The square root of 255319999 is about 15978.7358386075. The cubic root of 255319999 is about 634.3977168987.

The spelling of 255319999 in words is "two hundred fifty-five million, three hundred nineteen thousand, nine hundred ninety-nine".