199218 has 8 divisors (see below), whose sum is σ = 398448. Its totient is φ = 66404.

The previous prime is 199211. The next prime is 199247. The reversal of 199218 is 812991.

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

199218 is an admirable number.

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (199211) by changing a digit.

199218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16596 + ... + 16607.

It is an arithmetic number, because the mean of its divisors is an integer number (49806).

2¹⁹⁹²¹⁸ is an apocalyptic number.

199218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

199218 is a wasteful number, since it uses less digits than its factorization.

199218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33208.

The product of its digits is 1296, while the sum is 30.

The square root of 199218 is about 446.3384366151. The cubic root of 199218 is about 58.4040358129.

The spelling of 199218 in words is "one hundred ninety-nine thousand, two hundred eighteen".