115512217 has 2 divisors, whose sum is σ = 115512218. Its totient is φ = 115512216.

The previous prime is 115512193. The next prime is 115512227. The reversal of 115512217 is 712215511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59845696 + 55666521 = 7736^2 + 7461^2 .

It is a cyclic number.

It is not a de Polignac number, because 115512217 - 2²³ = 107123609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115512191 and 115512200.

It is not a weakly prime, because it can be changed into another prime (115512227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57756108 + 57756109.

It is an arithmetic number, because the mean of its divisors is an integer number (57756109).

Almost surely, 2^115512217 is an apocalyptic number.

It is an amenable number.

115512217 is a deficient number, since it is larger than the sum of its proper divisors (1).

115512217 is an equidigital number, since it uses as much as digits as its factorization.

115512217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 700, while the sum is 25.

The square root of 115512217 is about 10747.6610013528. The cubic root of 115512217 is about 487.0153387897.

Adding to 115512217 its reverse (712215511), we get a palindrome (827727728).

The spelling of 115512217 in words is "one hundred fifteen million, five hundred twelve thousand, two hundred seventeen".