115155815 has 4 divisors (see below), whose sum is σ = 138186984. Its totient is φ = 92124648.

The previous prime is 115155811. The next prime is 115155829. The reversal of 115155815 is 518551511.

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 115155815 - 2² = 115155811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115155811) 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, 11515577 + ... + 11515586.

It is an arithmetic number, because the mean of its divisors is an integer number (34546746).

Almost surely, 2^115155815 is an apocalyptic number.

115155815 is a deficient number, since it is larger than the sum of its proper divisors (23031169).

115155815 is an equidigital number, since it uses as much as digits as its factorization.

115155815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23031168.

The product of its digits is 5000, while the sum is 32.

The square root of 115155815 is about 10731.0677474332. The cubic root of 115155815 is about 486.5139428724.

The spelling of 115155815 in words is "one hundred fifteen million, one hundred fifty-five thousand, eight hundred fifteen".