225993999 has 96 divisors (see below), whose sum is σ = 414023680. Its totient is φ = 106920000.

The previous prime is 225993997. The next prime is 225994019. The reversal of 225993999 is 999399522.

It is not a de Polignac number, because 225993999 - 2¹ = 225993997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225993997) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1496574 + ... + 1496724.

Almost surely, 2^225993999 is an apocalyptic number.

225993999 is a deficient number, since it is larger than the sum of its proper divisors (188029681).

225993999 is a wasteful number, since it uses less digits than its factorization.

225993999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 222 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 57.

The square root of 225993999 is about 15033.0967867569. The cubic root of 225993999 is about 609.1145435040.

The spelling of 225993999 in words is "two hundred twenty-five million, nine hundred ninety-three thousand, nine hundred ninety-nine".