199821046 has 8 divisors (see below), whose sum is σ = 299809224. Its totient is φ = 99884640.

The previous prime is 199821007. The next prime is 199821113. The reversal of 199821046 is 640128991.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140 + ... + 20023.

It is an arithmetic number, because the mean of its divisors is an integer number (37476153).

Almost surely, 2^199821046 is an apocalyptic number.

199821046 is a deficient number, since it is larger than the sum of its proper divisors (99988178).

199821046 is a wasteful number, since it uses less digits than its factorization.

199821046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25886.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 199821046 is about 14135.8072284536. The cubic root of 199821046 is about 584.6290740375.

The spelling of 199821046 in words is "one hundred ninety-nine million, eight hundred twenty-one thousand, forty-six".