115322281 has 2 divisors, whose sum is σ = 115322282. Its totient is φ = 115322280.

The previous prime is 115322279. The next prime is 115322287. The reversal of 115322281 is 182223511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99680256 + 15642025 = 9984^2 + 3955^2 .

It is an emirp because it is prime and its reverse (182223511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115322281 - 2¹ = 115322279 is a prime.

It is a super-2 number, since 2×115322281² = 26598456990085922, which contains 22 as substring.

Together with 115322279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115322287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57661140 + 57661141.

It is an arithmetic number, because the mean of its divisors is an integer number (57661141).

Almost surely, 2^115322281 is an apocalyptic number.

It is an amenable number.

115322281 is a deficient number, since it is larger than the sum of its proper divisors (1).

115322281 is an equidigital number, since it uses as much as digits as its factorization.

115322281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 115322281 is about 10738.8212109151. The cubic root of 115322281 is about 486.7482602816.

Adding to 115322281 its reverse (182223511), we get a palindrome (297545792).

The spelling of 115322281 in words is "one hundred fifteen million, three hundred twenty-two thousand, two hundred eighty-one".