8221722912 has 270 divisors, whose sum is σ = 26375435163. Its totient is φ = 2511295488.

The previous prime is 8221722863. The next prime is 8221722947. The reversal of 8221722912 is 2192271228.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 1771063056 + 6450659856 = 42084^2 + 80316^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=64116.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 60012508 + ... + 60012644.

Almost surely, 2^8221722912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8221722912

8221722912 is an abundant number, since it is smaller than the sum of its proper divisors (18153712251).

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

8221722912 is a wasteful number, since it uses less digits than its factorization.

8221722912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 155 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 8221722912 is about 90673.7167651134. The cubic root of 8221722912 is about 2018.3087919582.

The spelling of 8221722912 in words is "eight billion, two hundred twenty-one million, seven hundred twenty-two thousand, nine hundred twelve".