8228210221 has 16 divisors (see below), whose sum is σ = 10303367040. Its totient is φ = 6383580480.

The previous prime is 8228210209. The next prime is 8228210267. The reversal of 8228210221 is 1220128228.

It is a cyclic number.

It is not a de Polignac number, because 8228210221 - 2¹⁹ = 8227685933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8228210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8228210321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215686 + ... + 250951.

It is an arithmetic number, because the mean of its divisors is an integer number (643960440).

Almost surely, 2^8228210221 is an apocalyptic number.

It is an amenable number.

8228210221 is a deficient number, since it is larger than the sum of its proper divisors (2075156819).

8228210221 is a wasteful number, since it uses less digits than its factorization.

8228210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466884.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 8228210221 is about 90709.4825307696. The cubic root of 8228210221 is about 2018.8394978569.

Adding to 8228210221 its reverse (1220128228), we get a palindrome (9448338449).

The spelling of 8228210221 in words is "eight billion, two hundred twenty-eight million, two hundred ten thousand, two hundred twenty-one".