4423224721 has 2 divisors, whose sum is σ = 4423224722. Its totient is φ = 4423224720.

The previous prime is 4423224697. The next prime is 4423224727. The reversal of 4423224721 is 1274223244.

4423224721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3564090000 + 859134721 = 59700^2 + 29311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4423224721 - 2⁷ = 4423224593 is a prime.

It is not a weakly prime, because it can be changed into another prime (4423224727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2211612360 + 2211612361.

It is an arithmetic number, because the mean of its divisors is an integer number (2211612361).

Almost surely, 2^4423224721 is an apocalyptic number.

It is an amenable number.

4423224721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4423224721 is an equidigital number, since it uses as much as digits as its factorization.

4423224721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 31.

The square root of 4423224721 is about 66507.3283255312. The cubic root of 4423224721 is about 1641.5205906059.

Adding to 4423224721 its reverse (1274223244), we get a palindrome (5697447965).

The spelling of 4423224721 in words is "four billion, four hundred twenty-three million, two hundred twenty-four thousand, seven hundred twenty-one".