195071281 has 2 divisors, whose sum is σ = 195071282. Its totient is φ = 195071280.

The previous prime is 195071273. The next prime is 195071297. The reversal of 195071281 is 182170591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163430656 + 31640625 = 12784^2 + 5625^2 .

It is a cyclic number.

It is not a de Polignac number, because 195071281 - 2³ = 195071273 is a prime.

It is a super-2 number, since 2×195071281² = 76105609341961922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195071221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97535640 + 97535641.

It is an arithmetic number, because the mean of its divisors is an integer number (97535641).

Almost surely, 2^195071281 is an apocalyptic number.

It is an amenable number.

195071281 is a deficient number, since it is larger than the sum of its proper divisors (1).

195071281 is an equidigital number, since it uses as much as digits as its factorization.

195071281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 195071281 is about 13966.7920797870. The cubic root of 195071281 is about 579.9596493926.

The spelling of 195071281 in words is "one hundred ninety-five million, seventy-one thousand, two hundred eighty-one".