195211986 has 48 divisors (see below), whose sum is σ = 419150784. Its totient is φ = 60592896.

The previous prime is 195211967. The next prime is 195211993. The reversal of 195211986 is 689112591.

195211986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178056 + ... + 179148.

It is an arithmetic number, because the mean of its divisors is an integer number (8732308).

Almost surely, 2^195211986 is an apocalyptic number.

195211986 is an abundant number, since it is smaller than the sum of its proper divisors (223938798).

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

195211986 is a wasteful number, since it uses less digits than its factorization.

195211986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1218 counting only the distinct ones).

The product of its digits is 38880, while the sum is 42.

The square root of 195211986 is about 13971.8282984010. The cubic root of 195211986 is about 580.0990575956.

The spelling of 195211986 in words is "one hundred ninety-five million, two hundred eleven thousand, nine hundred eighty-six".