198122218 has 8 divisors (see below), whose sum is σ = 339638112. Its totient is φ = 84909516.

The previous prime is 198122167. The next prime is 198122227. The reversal of 198122218 is 812221891.

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

It is a super-3 number, since 3×198122218³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7075780 + ... + 7075807.

It is an arithmetic number, because the mean of its divisors is an integer number (42454764).

Almost surely, 2^198122218 is an apocalyptic number.

198122218 is a deficient number, since it is larger than the sum of its proper divisors (141515894).

198122218 is a wasteful number, since it uses less digits than its factorization.

198122218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14151596.

The product of its digits is 4608, while the sum is 34.

The square root of 198122218 is about 14075.5894370360. The cubic root of 198122218 is about 582.9675670197.

The spelling of 198122218 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, two hundred eighteen".