228161218 has 8 divisors (see below), whose sum is σ = 349523712. Its totient is φ = 111653316.

The previous prime is 228161191. The next prime is 228161221. The reversal of 228161218 is 812161822.

228161218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 228161218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213530 + ... + 1213717.

It is an arithmetic number, because the mean of its divisors is an integer number (43690464).

Almost surely, 2^228161218 is an apocalyptic number.

228161218 is a deficient number, since it is larger than the sum of its proper divisors (121362494).

228161218 is a wasteful number, since it uses less digits than its factorization.

228161218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427296.

The product of its digits is 3072, while the sum is 31.

The square root of 228161218 is about 15105.0063886117. The cubic root of 228161218 is about 611.0554316238.

The spelling of 228161218 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, two hundred eighteen".