199820212 has 12 divisors (see below), whose sum is σ = 350235396. Its totient is φ = 99752960.

The previous prime is 199820209. The next prime is 199820213. The reversal of 199820212 is 212028991.

199820212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137030436 + 62789776 = 11706^2 + 7924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199820213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36403 + ... + 41530.

It is an arithmetic number, because the mean of its divisors is an integer number (29186283).

Almost surely, 2^199820212 is an apocalyptic number.

It is an amenable number.

199820212 is a deficient number, since it is larger than the sum of its proper divisors (150415184).

199820212 is a wasteful number, since it uses less digits than its factorization.

199820212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78578 (or 78576 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 199820212 is about 14135.7777288694. Note that the first 4 decimals coincide. The cubic root of 199820212 is about 584.6282606742.

The spelling of 199820212 in words is "one hundred ninety-nine million, eight hundred twenty thousand, two hundred twelve".