8220565 has 16 divisors (see below), whose sum is σ = 10222848. Its totient is φ = 6342336.

The previous prime is 8220557. The next prime is 8220577. The reversal of 8220565 is 5650228.

It is a cyclic number.

It is not a de Polignac number, because 8220565 - 2³ = 8220557 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 15 ways as a sum of consecutive naturals, for example, 17524 + ... + 17986.

It is an arithmetic number, because the mean of its divisors is an integer number (638928).

Almost surely, 2^8220565 is an apocalyptic number.

It is an amenable number.

8220565 is a deficient number, since it is larger than the sum of its proper divisors (2002283).

8220565 is a wasteful number, since it uses less digits than its factorization.

8220565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 8220565 is about 2867.1527688632. The cubic root of 8220565 is about 201.8214037541.

The spelling of 8220565 in words is "eight million, two hundred twenty thousand, five hundred sixty-five".