195815812 has 12 divisors (see below), whose sum is σ = 344781136. Its totient is φ = 97306920.

The previous prime is 195815783. The next prime is 195815897. The reversal of 195815812 is 218518591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149514 + ... + 150817.

Almost surely, 2^195815812 is an apocalyptic number.

It is an amenable number.

195815812 is a deficient number, since it is larger than the sum of its proper divisors (148965324).

195815812 is a wasteful number, since it uses less digits than its factorization.

195815812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300498 (or 300496 counting only the distinct ones).

The product of its digits is 28800, while the sum is 40.

The square root of 195815812 is about 13993.4203109890. The cubic root of 195815812 is about 580.6965590800.

The spelling of 195815812 in words is "one hundred ninety-five million, eight hundred fifteen thousand, eight hundred twelve".