225189917 has 8 divisors (see below), whose sum is σ = 232448832. Its totient is φ = 218015200.

The previous prime is 225189911. The next prime is 225189947. The reversal of 225189917 is 719981522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225189917 - 2⁸ = 225189661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225189911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15593 + ... + 26334.

It is an arithmetic number, because the mean of its divisors is an integer number (29056104).

Almost surely, 2^225189917 is an apocalyptic number.

It is an amenable number.

225189917 is a deficient number, since it is larger than the sum of its proper divisors (7258915).

225189917 is a wasteful number, since it uses less digits than its factorization.

225189917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42099.

The product of its digits is 90720, while the sum is 44.

The square root of 225189917 is about 15006.3292313610. The cubic root of 225189917 is about 608.3912793659.

The spelling of 225189917 in words is "two hundred twenty-five million, one hundred eighty-nine thousand, nine hundred seventeen".