195151866 has 32 divisors (see below), whose sum is σ = 480375168. Its totient is φ = 51468480.

The previous prime is 195151861. The next prime is 195151877. The reversal of 195151866 is 668151591.

195151866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (195151861) 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, 178165 + ... + 179256.

It is an arithmetic number, because the mean of its divisors is an integer number (15011724).

Almost surely, 2^195151866 is an apocalyptic number.

195151866 is an abundant number, since it is smaller than the sum of its proper divisors (285223302).

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

195151866 is a wasteful number, since it uses less digits than its factorization.

195151866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357446.

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

The square root of 195151866 is about 13969.6766605387. The cubic root of 195151866 is about 580.0394998862.

The spelling of 195151866 in words is "one hundred ninety-five million, one hundred fifty-one thousand, eight hundred sixty-six".