225198009 has 32 divisors (see below), whose sum is σ = 348733440. Its totient is φ = 143485776.

The previous prime is 225197941. The next prime is 225198091. The reversal of 225198009 is 900891522.

It is not a de Polignac number, because 225198009 - 2¹³ = 225189817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225198509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52504 + ... + 56630.

It is an arithmetic number, because the mean of its divisors is an integer number (10897920).

Almost surely, 2^225198009 is an apocalyptic number.

It is an amenable number.

225198009 is a deficient number, since it is larger than the sum of its proper divisors (123535431).

225198009 is a wasteful number, since it uses less digits than its factorization.

225198009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 225198009 is about 15006.5988485066. The cubic root of 225198009 is about 608.3985666123.

The spelling of 225198009 in words is "two hundred twenty-five million, one hundred ninety-eight thousand, nine".