8108215 has 4 divisors (see below), whose sum is σ = 9729864. Its totient is φ = 6486568.

The previous prime is 8108207. The next prime is 8108237. The reversal of 8108215 is 5128018.

8108215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8108215 - 2³ = 8108207 is a prime.

It is a Duffinian number.

8108215 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8108215.

It is a congruent number.

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, 810817 + ... + 810826.

It is an arithmetic number, because the mean of its divisors is an integer number (2432466).

Almost surely, 2^8108215 is an apocalyptic number.

8108215 is a deficient number, since it is larger than the sum of its proper divisors (1621649).

8108215 is a wasteful number, since it uses less digits than its factorization.

8108215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621648.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 8108215 is about 2847.4927567950. The cubic root of 8108215 is about 200.8977558095.

It can be divided in two parts, 810 and 8215, that added together give a square (9025 = 95²).

The spelling of 8108215 in words is "eight million, one hundred eight thousand, two hundred fifteen".