199901022 has 32 divisors (see below), whose sum is σ = 405212544. Its totient is φ = 65738400.

The previous prime is 199901021. The next prime is 199901029. The reversal of 199901022 is 220109991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199901021) 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 15 ways as a sum of consecutive naturals, for example, 154197 + ... + 155487.

It is an arithmetic number, because the mean of its divisors is an integer number (12662892).

Almost surely, 2^199901022 is an apocalyptic number.

199901022 is an abundant number, since it is smaller than the sum of its proper divisors (205311522).

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

199901022 is a wasteful number, since it uses less digits than its factorization.

199901022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 199901022 is about 14138.6357899198. The cubic root of 199901022 is about 584.7070605814.

It can be divided in two parts, 19990 and 1022, that added together give a palindrome (21012).

The spelling of 199901022 in words is "one hundred ninety-nine million, nine hundred one thousand, twenty-two".