199218204 has 54 divisors (see below), whose sum is σ = 522990104. Its totient is φ = 66397320.

The previous prime is 199218191. The next prime is 199218247. The reversal of 199218204 is 402812991.

It is a tau number, because it is divible by the number of its divisors (54).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 22449 + ... + 30039.

Almost surely, 2^199218204 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 199218204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261495052).

199218204 is an abundant number, since it is smaller than the sum of its proper divisors (323771900).

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

199218204 is an frugal number, since it uses more digits than its factorization.

199218204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7619 (or 7596 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 199218204 is about 14114.4678964529. The cubic root of 199218204 is about 584.0405574823.

The spelling of 199218204 in words is "one hundred ninety-nine million, two hundred eighteen thousand, two hundred four".