8864221 has 4 divisors (see below), whose sum is σ = 8901244. Its totient is φ = 8827200.

The previous prime is 8864189. The next prime is 8864231. The reversal of 8864221 is 1224688.

8864221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 6320196 = 1595^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 8864221 - 2⁵ = 8864189 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8864231) 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, 18150 + ... + 18631.

It is an arithmetic number, because the mean of its divisors is an integer number (2225311).

Almost surely, 2^8864221 is an apocalyptic number.

It is an amenable number.

8864221 is a deficient number, since it is larger than the sum of its proper divisors (37023).

8864221 is a wasteful number, since it uses less digits than its factorization.

8864221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37022.

The product of its digits is 6144, while the sum is 31.

The square root of 8864221 is about 2977.2841651411. The cubic root of 8864221 is about 206.9570340317.

The spelling of 8864221 in words is "eight million, eight hundred sixty-four thousand, two hundred twenty-one".