195651563 has 2 divisors, whose sum is σ = 195651564. Its totient is φ = 195651562.

The previous prime is 195651559. The next prime is 195651581. The reversal of 195651563 is 365156591.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195651563 - 2² = 195651559 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195651563.

It is not a weakly prime, because it can be changed into another prime (195551563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97825781 + 97825782.

It is an arithmetic number, because the mean of its divisors is an integer number (97825782).

Almost surely, 2^195651563 is an apocalyptic number.

195651563 is a deficient number, since it is larger than the sum of its proper divisors (1).

195651563 is an equidigital number, since it uses as much as digits as its factorization.

195651563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 41.

The square root of 195651563 is about 13987.5502858792. The cubic root of 195651563 is about 580.5341521931.

The spelling of 195651563 in words is "one hundred ninety-five million, six hundred fifty-one thousand, five hundred sixty-three".