8845221 has 36 divisors (see below), whose sum is σ = 15070496. Its totient is φ = 4517040.

The previous prime is 8845211. The next prime is 8845231. The reversal of 8845221 is 1225488.

8845221 = 159² + 160² + ... + 312².

It is an interprime number because it is at equal distance from previous prime (8845211) and next prime (8845231).

It is not a de Polignac number, because 8845221 - 2⁵ = 8845189 is a prime.

Its product of digits (5120) is a multiple of the sum of its prime divisors (80).

8845221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8845201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 149890 + ... + 149948.

Almost surely, 2^8845221 is an apocalyptic number.

It is an amenable number.

8845221 is a deficient number, since it is larger than the sum of its proper divisors (6225275).

8845221 is a wasteful number, since it uses less digits than its factorization.

8845221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 80 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 8845221 is about 2974.0916260263. The cubic root of 8845221 is about 206.8090610184.

It can be divided in two parts, 884 and 5221, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 8845221 in words is "eight million, eight hundred forty-five thousand, two hundred twenty-one".