8221365 has 16 divisors (see below), whose sum is σ = 14616000. Its totient is φ = 4384656.

The previous prime is 8221349. The next prime is 8221391. The reversal of 8221365 is 5631228.

It is not a de Polignac number, because 8221365 - 2⁴ = 8221349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

8221365 is a lucky 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, 30315 + ... + 30584.

It is an arithmetic number, because the mean of its divisors is an integer number (913500).

Almost surely, 2^8221365 is an apocalyptic number.

It is an amenable number.

8221365 is a deficient number, since it is larger than the sum of its proper divisors (6394635).

8221365 is a wasteful number, since it uses less digits than its factorization.

8221365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60913 (or 60907 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 8221365 is about 2867.2922766959. The cubic root of 8221365 is about 201.8279504203.

It can be divided in two parts, 822 and 1365, that added together give a 7-th power (2187 = 3⁷).

The spelling of 8221365 in words is "eight million, two hundred twenty-one thousand, three hundred sixty-five".