199851822 has 24 divisors (see below), whose sum is σ = 435885840. Its totient is φ = 66175200.

The previous prime is 199851811. The next prime is 199851829. The reversal of 199851822 is 228158991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199851829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34047 + ... + 39482.

It is an arithmetic number, because the mean of its divisors is an integer number (18161910).

Almost surely, 2^199851822 is an apocalyptic number.

199851822 is an abundant number, since it is smaller than the sum of its proper divisors (236034018).

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

199851822 is a wasteful number, since it uses less digits than its factorization.

199851822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73688 (or 73685 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 199851822 is about 14136.8957695811. The cubic root of 199851822 is about 584.6590869267.

The spelling of 199851822 in words is "one hundred ninety-nine million, eight hundred fifty-one thousand, eight hundred twenty-two".