4223322821 has 2 divisors, whose sum is σ = 4223322822. Its totient is φ = 4223322820.

The previous prime is 4223322811. The next prime is 4223322833. The reversal of 4223322821 is 1282233224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2471481796 + 1751841025 = 49714^2 + 41855^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223322821 - 2²² = 4219128517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4223322811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111661410 + 2111661411.

It is an arithmetic number, because the mean of its divisors is an integer number (2111661411).

Almost surely, 2^4223322821 is an apocalyptic number.

It is an amenable number.

4223322821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223322821 is an equidigital number, since it uses as much as digits as its factorization.

4223322821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

The square root of 4223322821 is about 64987.0973424725. The cubic root of 4223322821 is about 1616.4096197030.

The spelling of 4223322821 in words is "four billion, two hundred twenty-three million, three hundred twenty-two thousand, eight hundred twenty-one".