225168816 has 80 divisors (see below), whose sum is σ = 593649504. Its totient is φ = 73531392.

The previous prime is 225168803. The next prime is 225168877. The reversal of 225168816 is 618861522.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637696 + ... + 638048.

Almost surely, 2^225168816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225168816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296824752).

225168816 is an abundant number, since it is smaller than the sum of its proper divisors (368480688).

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

225168816 is a wasteful number, since it uses less digits than its factorization.

225168816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 592 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 225168816 is about 15005.6261448831. The cubic root of 225168816 is about 608.3722760500.

The spelling of 225168816 in words is "two hundred twenty-five million, one hundred sixty-eight thousand, eight hundred sixteen".