443742836221 has 2 divisors, whose sum is σ = 443742836222. Its totient is φ = 443742836220.

The previous prime is 443742836191. The next prime is 443742836263. The reversal of 443742836221 is 122638247344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290224625625 + 153518210596 = 538725^2 + 391814^2 .

It is a cyclic number.

It is not a de Polignac number, because 443742836221 - 2¹⁵ = 443742803453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443742836521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221871418110 + 221871418111.

It is an arithmetic number, because the mean of its divisors is an integer number (221871418111).

Almost surely, 2^443742836221 is an apocalyptic number.

It is an amenable number.

443742836221 is a deficient number, since it is larger than the sum of its proper divisors (1).

443742836221 is an equidigital number, since it uses as much as digits as its factorization.

443742836221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 46.

The spelling of 443742836221 in words is "four hundred forty-three billion, seven hundred forty-two million, eight hundred thirty-six thousand, two hundred twenty-one".