199821472 has 24 divisors (see below), whose sum is σ = 395388000. Its totient is φ = 99405504.

The previous prime is 199821467. The next prime is 199821481. The reversal of 199821472 is 274128991.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322 + ... + 22057.

It is an arithmetic number, because the mean of its divisors is an integer number (16474500).

Almost surely, 2^199821472 is an apocalyptic number.

It is an amenable number.

199821472 is a deficient number, since it is larger than the sum of its proper divisors (195566528).

199821472 is a wasteful number, since it uses less digits than its factorization.

199821472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31588 (or 31580 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 199821472 is about 14135.8222965627. The cubic root of 199821472 is about 584.6294894956.

The spelling of 199821472 in words is "one hundred ninety-nine million, eight hundred twenty-one thousand, four hundred seventy-two".