199218195 has 48 divisors (see below), whose sum is σ = 384763392. Its totient is φ = 94524480.

The previous prime is 199218191. The next prime is 199218247. The reversal of 199218195 is 591812991.

It is not a de Polignac number, because 199218195 - 2² = 199218191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 199218195.

It is not an unprimeable number, because it can be changed into a prime (199218191) 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 47 ways as a sum of consecutive naturals, for example, 18984 + ... + 27546.

It is an arithmetic number, because the mean of its divisors is an integer number (8015904).

Almost surely, 2^199218195 is an apocalyptic number.

199218195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199218195 is a deficient number, since it is larger than the sum of its proper divisors (185545197).

199218195 is a wasteful number, since it uses less digits than its factorization.

199218195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632 (or 8629 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 199218195 is about 14114.4675776311. The cubic root of 199218195 is about 584.0405486873.

The spelling of 199218195 in words is "one hundred ninety-nine million, two hundred eighteen thousand, one hundred ninety-five".