225279999 has 24 divisors (see below), whose sum is σ = 379485600. Its totient is φ = 128729664.

The previous prime is 225279983. The next prime is 225280031. The reversal of 225279999 is 999972522.

225279999 is a `hidden beast` number, since 22 + 527 + 9 + 9 + 99 = 666.

It is not a de Polignac number, because 225279999 - 2⁴ = 225279983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225279919) 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 23 ways as a sum of consecutive naturals, for example, 33402 + ... + 39575.

It is an arithmetic number, because the mean of its divisors is an integer number (15811900).

Almost surely, 2^225279999 is an apocalyptic number.

225279999 is a deficient number, since it is larger than the sum of its proper divisors (154205601).

225279999 is an equidigital number, since it uses as much as digits as its factorization.

225279999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73004 (or 72987 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 225279999 is about 15009.3303981224. The cubic root of 225279999 is about 608.4723928215.

The spelling of 225279999 in words is "two hundred twenty-five million, two hundred seventy-nine thousand, nine hundred ninety-nine".