4443323440421 has 4 divisors (see below), whose sum is σ = 4451851892844. Its totient is φ = 4434794988000.

The previous prime is 4443323440403. The next prime is 4443323440471. The reversal of 4443323440421 is 1240443233444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1677255517921 + 2766067922500 = 1295089^2 + 1663150^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443323440421 - 2¹⁴ = 4443323424037 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 (4443323440471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4264225430 + ... + 4264226471.

It is an arithmetic number, because the mean of its divisors is an integer number (1112962973211).

Almost surely, 2^{4443323440421} is an apocalyptic number.

It is an amenable number.

4443323440421 is a deficient number, since it is larger than the sum of its proper divisors (8528452423).

4443323440421 is an equidigital number, since it uses as much as digits as its factorization.

4443323440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8528452422.

The product of its (nonzero) digits is 442368, while the sum is 38.

Adding to 4443323440421 its reverse (1240443233444), we get a palindrome (5683766673865).

The spelling of 4443323440421 in words is "four trillion, four hundred forty-three billion, three hundred twenty-three million, four hundred forty thousand, four hundred twenty-one".