195173217 has 6 divisors (see below), whose sum is σ = 281916882. Its totient is φ = 130115472.

The previous prime is 195173201. The next prime is 195173227. The reversal of 195173217 is 712371591.

It can be written as a sum of positive squares in only one way, i.e., 136328976 + 58844241 = 11676^2 + 7671^2 .

It is not a de Polignac number, because 195173217 - 2⁴ = 195173201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195173227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10842948 + ... + 10842965.

It is an arithmetic number, because the mean of its divisors is an integer number (46986147).

Almost surely, 2^195173217 is an apocalyptic number.

It is an amenable number.

195173217 is a deficient number, since it is larger than the sum of its proper divisors (86743665).

195173217 is a wasteful number, since it uses less digits than its factorization.

195173217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21685919 (or 21685916 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 195173217 is about 13970.4408305536. The cubic root of 195173217 is about 580.0606525949.

The spelling of 195173217 in words is "one hundred ninety-five million, one hundred seventy-three thousand, two hundred seventeen".