195217161 has 16 divisors (see below), whose sum is σ = 263337984. Its totient is φ = 128628864.

The previous prime is 195217157. The next prime is 195217177. The reversal of 195217161 is 161712591.

It is not a de Polignac number, because 195217161 - 2² = 195217157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195217151) 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 15 ways as a sum of consecutive naturals, for example, 118435 + ... + 120071.

It is an arithmetic number, because the mean of its divisors is an integer number (16458624).

Almost surely, 2^195217161 is an apocalyptic number.

It is an amenable number.

195217161 is a deficient number, since it is larger than the sum of its proper divisors (68120823).

195217161 is a wasteful number, since it uses less digits than its factorization.

195217161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080.

The product of its digits is 3780, while the sum is 33.

The square root of 195217161 is about 13972.0134912617. The cubic root of 195217161 is about 580.1041836232.

The spelling of 195217161 in words is "one hundred ninety-five million, two hundred seventeen thousand, one hundred sixty-one".