199991322 has 32 divisors (see below), whose sum is σ = 449789760. Its totient is φ = 65859120.

The previous prime is 199991303. The next prime is 199991339. The reversal of 199991322 is 223199991.

199991322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17829 + ... + 26792.

It is an arithmetic number, because the mean of its divisors is an integer number (14055930).

Almost surely, 2^199991322 is an apocalyptic number.

199991322 is an abundant number, since it is smaller than the sum of its proper divisors (249798438).

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

199991322 is a wasteful number, since it uses less digits than its factorization.

199991322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44715 (or 44709 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 199991322 is about 14141.8288067704. The cubic root of 199991322 is about 584.7950893116.

It can be divided in two parts, 19999 and 1322, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 199991322 in words is "one hundred ninety-nine million, nine hundred ninety-one thousand, three hundred twenty-two".