8306722821 has 8 divisors (see below), whose sum is σ = 11084308704. Its totient is φ = 5533476080.

The previous prime is 8306722819. The next prime is 8306722829. The reversal of 8306722821 is 1282276038.

8306722821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8306722821 - 2¹ = 8306722819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8306722821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8306722829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080315 + ... + 1087976.

It is an arithmetic number, because the mean of its divisors is an integer number (1385538588).

Almost surely, 2^8306722821 is an apocalyptic number.

It is an amenable number.

8306722821 is a deficient number, since it is larger than the sum of its proper divisors (2777585883).

8306722821 is a wasteful number, since it uses less digits than its factorization.

8306722821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169571.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 8306722821 is about 91141.2245967762. The cubic root of 8306722821 is about 2025.2403572645.

Adding to 8306722821 its reverse (1282276038), we get a palindrome (9588998859).

The spelling of 8306722821 in words is "eight billion, three hundred six million, seven hundred twenty-two thousand, eight hundred twenty-one".