115811370281 has 2 divisors, whose sum is σ = 115811370282. Its totient is φ = 115811370280.

The previous prime is 115811370251. The next prime is 115811370319. The reversal of 115811370281 is 182073118511.

It is an a-pointer prime, because the next prime (115811370319) can be obtained adding 115811370281 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60181902400 + 55629467881 = 245320^2 + 235859^2 .

It is a cyclic number.

It is not a de Polignac number, because 115811370281 - 2¹⁸ = 115811108137 is a prime.

It is a super-2 number, since 2×115811370281² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (115811370251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57905685140 + 57905685141.

It is an arithmetic number, because the mean of its divisors is an integer number (57905685141).

Almost surely, 2^115811370281 is an apocalyptic number.

It is an amenable number.

115811370281 is a deficient number, since it is larger than the sum of its proper divisors (1).

115811370281 is an equidigital number, since it uses as much as digits as its factorization.

115811370281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 38.

Adding to 115811370281 its reverse (182073118511), we get a palindrome (297884488792).

The spelling of 115811370281 in words is "one hundred fifteen billion, eight hundred eleven million, three hundred seventy thousand, two hundred eighty-one".