195865319 has 16 divisors (see below), whose sum is σ = 224138880. Its totient is φ = 169659360.

The previous prime is 195865297. The next prime is 195865339. The reversal of 195865319 is 913568591.

It is not a de Polignac number, because 195865319 - 2⁸ = 195865063 is a prime.

It is a super-2 number, since 2×195865319² = 76726446373943522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195865339) 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, 22724 + ... + 30134.

It is an arithmetic number, because the mean of its divisors is an integer number (14008680).

Almost surely, 2^195865319 is an apocalyptic number.

195865319 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

195865319 is a deficient number, since it is larger than the sum of its proper divisors (28273561).

195865319 is a wasteful number, since it uses less digits than its factorization.

195865319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550.

The product of its digits is 291600, while the sum is 47.

The square root of 195865319 is about 13995.1891377001. The cubic root of 195865319 is about 580.7454930277.

The spelling of 195865319 in words is "one hundred ninety-five million, eight hundred sixty-five thousand, three hundred nineteen".