8115 has 8 divisors (see below), whose sum is σ = 13008. Its totient is φ = 4320.

The previous prime is 8111. The next prime is 8117. The reversal of 8115 is 5118.

It is a happy number.

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

It is not a de Polignac number, because 8115 - 2² = 8111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 541 = 8115 / (8 + 1 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 8094 and 8103.

It is not an unprimeable number, because it can be changed into a prime (8111) 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, 256 + ... + 285.

It is an arithmetic number, because the mean of its divisors is an integer number (1626).

2⁸¹¹⁵ is an apocalyptic number.

8115 is a deficient number, since it is larger than the sum of its proper divisors (4893).

8115 is a wasteful number, since it uses less digits than its factorization.

8115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

The product of its digits is 40, while the sum is 15.

The square root of 8115 is about 90.0832947888. The cubic root of 8115 is about 20.0953777644.

Subtracting from 8115 its sum of digits (15), we obtain a square (8100 = 90²).

The spelling of 8115 in words is "eight thousand, one hundred fifteen".