115218115 has 4 divisors (see below), whose sum is σ = 138261744. Its totient is φ = 92174488.

The previous prime is 115218101. The next prime is 115218133. The reversal of 115218115 is 511812511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115218115 - 2⁷ = 115217987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115218115.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11521807 + ... + 11521816.

It is an arithmetic number, because the mean of its divisors is an integer number (34565436).

Almost surely, 2^115218115 is an apocalyptic number.

115218115 is a deficient number, since it is larger than the sum of its proper divisors (23043629).

115218115 is an equidigital number, since it uses as much as digits as its factorization.

115218115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23043628.

The product of its digits is 400, while the sum is 25.

The square root of 115218115 is about 10733.9701415646. The cubic root of 115218115 is about 486.6016627279.

The spelling of 115218115 in words is "one hundred fifteen million, two hundred eighteen thousand, one hundred fifteen".