199807212 has 48 divisors (see below), whose sum is σ = 512064000. Its totient is φ = 60135360.

The previous prime is 199807207. The next prime is 199807213. The reversal of 199807212 is 212708991.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (199807213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14589 + ... + 24747.

It is an arithmetic number, because the mean of its divisors is an integer number (10668000).

Almost surely, 2^199807212 is an apocalyptic number.

199807212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199807212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256032000).

199807212 is an abundant number, since it is smaller than the sum of its proper divisors (312256788).

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

199807212 is a wasteful number, since it uses less digits than its factorization.

199807212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326 (or 10324 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 199807212 is about 14135.3178952580. The cubic root of 199807212 is about 584.6155820565.

The spelling of 199807212 in words is "one hundred ninety-nine million, eight hundred seven thousand, two hundred twelve".