225999999 has 12 divisors (see below), whose sum is σ = 326656512. Its totient is φ = 150568800.

The previous prime is 225999997. The next prime is 226000007. The reversal of 225999999 is 999999522.

It is not a de Polignac number, because 225999999 - 2¹ = 225999997 is a prime.

225999999 is a modest number, since divided by 99999 gives 2259 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225999997) 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 11 ways as a sum of consecutive naturals, for example, 8194 + ... + 22784.

It is an arithmetic number, because the mean of its divisors is an integer number (27221376).

Almost surely, 2^225999999 is an apocalyptic number.

225999999 is a deficient number, since it is larger than the sum of its proper divisors (100656513).

225999999 is a wasteful number, since it uses less digits than its factorization.

225999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16318 (or 16315 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 63.

The square root of 225999999 is about 15033.2963451134. The cubic root of 225999999 is about 609.1199339936.

The spelling of 225999999 in words is "two hundred twenty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".