195237281 has 2 divisors, whose sum is σ = 195237282. Its totient is φ = 195237280.

The previous prime is 195237257. The next prime is 195237311. The reversal of 195237281 is 182732591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169390225 + 25847056 = 13015^2 + 5084^2 .

It is an emirp because it is prime and its reverse (182732591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195237281 - 2¹⁰ = 195236257 is a prime.

It is a super-2 number, since 2×195237281² = 76235191784545922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (195237181) 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 as a sum of consecutive naturals, namely, 97618640 + 97618641.

It is an arithmetic number, because the mean of its divisors is an integer number (97618641).

Almost surely, 2^195237281 is an apocalyptic number.

It is an amenable number.

195237281 is a deficient number, since it is larger than the sum of its proper divisors (1).

195237281 is an equidigital number, since it uses as much as digits as its factorization.

195237281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 195237281 is about 13972.7334834670. The cubic root of 195237281 is about 580.1241123616.

The spelling of 195237281 in words is "one hundred ninety-five million, two hundred thirty-seven thousand, two hundred eighty-one".