222161730 has 64 divisors (see below), whose sum is σ = 615333888. Its totient is φ = 50281920.

The previous prime is 222161677. The next prime is 222161759. The reversal of 222161730 is 37161222.

222161730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222161730.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16495 + ... + 26765.

It is an arithmetic number, because the mean of its divisors is an integer number (9614592).

Almost surely, 2^222161730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222161730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307666944).

222161730 is an abundant number, since it is smaller than the sum of its proper divisors (393172158).

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

222161730 is a wasteful number, since it uses less digits than its factorization.

222161730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 222161730 is about 14905.0907410857. The cubic root of 222161730 is about 605.6518984582.

The spelling of 222161730 in words is "two hundred twenty-two million, one hundred sixty-one thousand, seven hundred thirty".