8221536 has 36 divisors (see below), whose sum is σ = 23380812. Its totient is φ = 2740416.

The previous prime is 8221513. The next prime is 8221537. The reversal of 8221536 is 6351228.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13986 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (649467).

Almost surely, 2^8221536 is an apocalyptic number.

It is an amenable number.

8221536 is an abundant number, since it is smaller than the sum of its proper divisors (15159276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8221536 is a wasteful number, since it uses less digits than its factorization.

8221536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28563 (or 28552 counting only the distinct ones).

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

The square root of 8221536 is about 2867.3220956147. The cubic root of 8221536 is about 201.8293497151.

The spelling of 8221536 in words is "eight million, two hundred twenty-one thousand, five hundred thirty-six".