225199509 has 16 divisors (see below), whose sum is σ = 316372992. Its totient is φ = 142206768.

The previous prime is 225199489. The next prime is 225199547. The reversal of 225199509 is 905991522.

It is a happy number.

225199509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225199509 - 2⁸ = 225199253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225199549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8737 + ... + 22950.

It is an arithmetic number, because the mean of its divisors is an integer number (19773312).

Almost surely, 2^225199509 is an apocalyptic number.

It is an amenable number.

225199509 is a deficient number, since it is larger than the sum of its proper divisors (91173483).

225199509 is a wasteful number, since it uses less digits than its factorization.

225199509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31816.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 225199509 is about 15006.6488264369. The cubic root of 225199509 is about 608.3999174174.

The spelling of 225199509 in words is "two hundred twenty-five million, one hundred ninety-nine thousand, five hundred nine".