8022821 has 8 divisors (see below), whose sum is σ = 8524920. Its totient is φ = 7535808.

The previous prime is 8022809. The next prime is 8022823. The reversal of 8022821 is 1282208.

8022821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5085025 + 2937796 = 2255^2 + 1714^2 .

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 8022821 - 2¹⁴ = 8006437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8022823) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2666 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (1065615).

Almost surely, 2^8022821 is an apocalyptic number.

It is an amenable number.

8022821 is a deficient number, since it is larger than the sum of its proper divisors (502099).

8022821 is a wasteful number, since it uses less digits than its factorization.

8022821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 8022821 is about 2832.4584727759. The cubic root of 8022821 is about 200.1899944534.

The spelling of 8022821 in words is "eight million, twenty-two thousand, eight hundred twenty-one".