199159950 has 72 divisors (see below), whose sum is σ = 542949624. Its totient is φ = 48276800.

The previous prime is 199159931. The next prime is 199159963. The reversal of 199159950 is 59951991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199159950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12664 + ... + 23636.

It is an arithmetic number, because the mean of its divisors is an integer number (7540967).

Almost surely, 2^199159950 is an apocalyptic number.

199159950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199159950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271474812).

199159950 is an abundant number, since it is smaller than the sum of its proper divisors (343789674).

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

199159950 is a wasteful number, since it uses less digits than its factorization.

199159950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010 (or 10994 counting only the distinct ones).

The product of its (nonzero) digits is 164025, while the sum is 48.

The square root of 199159950 is about 14112.4041183634. The cubic root of 199159950 is about 583.9836249083.

The spelling of 199159950 in words is "one hundred ninety-nine million, one hundred fifty-nine thousand, nine hundred fifty".