8220615 has 16 divisors (see below), whose sum is σ = 14165088. Its totient is φ = 4046976.

The previous prime is 8220581. The next prime is 8220631. The reversal of 8220615 is 5160228.

8220615 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8220615 - 2⁶ = 8220551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20884 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (885318).

Almost surely, 2^8220615 is an apocalyptic number.

8220615 is a deficient number, since it is larger than the sum of its proper divisors (5944473).

8220615 is a wasteful number, since it uses less digits than its factorization.

8220615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42178.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 8220615 is about 2867.1614883016. The cubic root of 8220615 is about 201.8218129332.

The spelling of 8220615 in words is "eight million, two hundred twenty thousand, six hundred fifteen".