199545156 has 36 divisors (see below), whose sum is σ = 509129712. Its totient is φ = 65892144.

The previous prime is 199545131. The next prime is 199545169. The reversal of 199545156 is 651545991.

It is a happy number.

199545156 is a `hidden beast` number, since 1 + 99 + 545 + 15 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22050 + ... + 29753.

It is an arithmetic number, because the mean of its divisors is an integer number (14142492).

Almost surely, 2^199545156 is an apocalyptic number.

It is an amenable number.

199545156 is an abundant number, since it is smaller than the sum of its proper divisors (309584556).

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

199545156 is a wasteful number, since it uses less digits than its factorization.

199545156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51920 (or 51915 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 199545156 is about 14126.0453064543. The cubic root of 199545156 is about 584.3598871705.

The spelling of 199545156 in words is "one hundred ninety-nine million, five hundred forty-five thousand, one hundred fifty-six".