195222719 has 2 divisors, whose sum is σ = 195222720. Its totient is φ = 195222718.

The previous prime is 195222707. The next prime is 195222721. The reversal of 195222719 is 917222591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195222719 - 2²⁰ = 194174143 is a prime.

It is a super-2 number, since 2×195222719² = 76223820027505922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 195222721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195227719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97611359 + 97611360.

It is an arithmetic number, because the mean of its divisors is an integer number (97611360).

Almost surely, 2^195222719 is an apocalyptic number.

195222719 is a deficient number, since it is larger than the sum of its proper divisors (1).

195222719 is an equidigital number, since it uses as much as digits as its factorization.

195222719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 195222719 is about 13972.2123874496. The cubic root of 195222719 is about 580.1096889255.

The spelling of 195222719 in words is "one hundred ninety-five million, two hundred twenty-two thousand, seven hundred nineteen".