225217168 has 20 divisors (see below), whose sum is σ = 476027568. Its totient is φ = 102371360.

The previous prime is 225217129. The next prime is 225217169. The reversal of 225217168 is 861712522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (225217169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639646 + ... + 639997.

Almost surely, 2^225217168 is an apocalyptic number.

It is an amenable number.

225217168 is an abundant number, since it is smaller than the sum of its proper divisors (250810400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225217168 is a wasteful number, since it uses less digits than its factorization.

225217168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279662 (or 1279656 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 225217168 is about 15007.2371874373. The cubic root of 225217168 is about 608.4158195440.

The spelling of 225217168 in words is "two hundred twenty-five million, two hundred seventeen thousand, one hundred sixty-eight".