199185045 has 16 divisors (see below), whose sum is σ = 319485120. Its totient is φ = 105969024.

The previous prime is 199185043. The next prime is 199185053. The reversal of 199185045 is 540581991.

It is not a de Polignac number, because 199185045 - 2¹ = 199185043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199184988 and 199185006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199185043) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10099 + ... + 22368.

It is an arithmetic number, because the mean of its divisors is an integer number (19967820).

Almost surely, 2^199185045 is an apocalyptic number.

199185045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199185045 is a deficient number, since it is larger than the sum of its proper divisors (120300075).

199185045 is a wasteful number, since it uses less digits than its factorization.

199185045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32884.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 199185045 is about 14113.2932018009. The cubic root of 199185045 is about 584.0081520176.

The spelling of 199185045 in words is "one hundred ninety-nine million, one hundred eighty-five thousand, forty-five".