115715217 has 8 divisors (see below), whose sum is σ = 154365696. Its totient is φ = 77104112.

The previous prime is 115715213. The next prime is 115715261. The reversal of 115715217 is 712517511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115715217 - 2² = 115715213 is a prime.

It is a super-2 number, since 2×115715217² = 26780022890714178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115715213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2118 + ... + 15359.

It is an arithmetic number, because the mean of its divisors is an integer number (19295712).

Almost surely, 2^115715217 is an apocalyptic number.

It is an amenable number.

115715217 is a deficient number, since it is larger than the sum of its proper divisors (38650479).

115715217 is a wasteful number, since it uses less digits than its factorization.

115715217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19687.

The product of its digits is 2450, while the sum is 30.

The square root of 115715217 is about 10757.1007711186. The cubic root of 115715217 is about 487.3004637706.

The spelling of 115715217 in words is "one hundred fifteen million, seven hundred fifteen thousand, two hundred seventeen".