8809221 has 4 divisors (see below), whose sum is σ = 11745632. Its totient is φ = 5872812.

The previous prime is 8809187. The next prime is 8809259. The reversal of 8809221 is 1229088.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8809221 - 2¹⁴ = 8792837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8809291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468201 + ... + 1468206.

It is an arithmetic number, because the mean of its divisors is an integer number (2936408).

Almost surely, 2^8809221 is an apocalyptic number.

It is an amenable number.

8809221 is a deficient number, since it is larger than the sum of its proper divisors (2936411).

8809221 is a wasteful number, since it uses less digits than its factorization.

8809221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936410.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8809221 is about 2968.0331871460. The cubic root of 8809221 is about 206.5281089413.

It can be divided in two parts, 880 and 9221, that added together give a palindrome (10101).

The spelling of 8809221 in words is "eight million, eight hundred nine thousand, two hundred twenty-one".