8165215 has 4 divisors (see below), whose sum is σ = 9798264. Its totient is φ = 6532168.

The previous prime is 8165149. The next prime is 8165221. The reversal of 8165215 is 5125618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5125618 = 2 ⋅2562809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8165215 is a prime.

It is a Duffinian number.

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, 816517 + ... + 816526.

It is an arithmetic number, because the mean of its divisors is an integer number (2449566).

Almost surely, 2^8165215 is an apocalyptic number.

8165215 is a deficient number, since it is larger than the sum of its proper divisors (1633049).

8165215 is a wasteful number, since it uses less digits than its factorization.

8165215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633048.

The product of its digits is 2400, while the sum is 28.

The square root of 8165215 is about 2857.4840332012. The cubic root of 8165215 is about 201.3674211564.

The spelling of 8165215 in words is "eight million, one hundred sixty-five thousand, two hundred fifteen".