115116217 has 4 divisors (see below), whose sum is σ = 115148880. Its totient is φ = 115083556.

The previous prime is 115116191. The next prime is 115116223. The reversal of 115116217 is 712611511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712611511 = 19 ⋅37505869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115116217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115116191 and 115116200.

It is not an unprimeable number, because it can be changed into a prime (115116277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10303 + ... + 18340.

It is an arithmetic number, because the mean of its divisors is an integer number (28787220).

Almost surely, 2^115116217 is an apocalyptic number.

It is an amenable number.

115116217 is a deficient number, since it is larger than the sum of its proper divisors (32663).

115116217 is an equidigital number, since it uses as much as digits as its factorization.

115116217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32662.

The product of its digits is 420, while the sum is 25.

The square root of 115116217 is about 10729.2225720226. Note that the first 3 decimals coincide. The cubic root of 115116217 is about 486.4581715169.

Adding to 115116217 its reverse (712611511), we get a palindrome (827727728).

The spelling of 115116217 in words is "one hundred fifteen million, one hundred sixteen thousand, two hundred seventeen".