444221202013 has 2 divisors, whose sum is σ = 444221202014. Its totient is φ = 444221202012.

The previous prime is 444221201999. The next prime is 444221202017. The reversal of 444221202013 is 310202122444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441669234724 + 2551967289 = 664582^2 + 50517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444221202013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444221202017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222110601006 + 222110601007.

It is an arithmetic number, because the mean of its divisors is an integer number (222110601007).

Almost surely, 2^444221202013 is an apocalyptic number.

It is an amenable number.

444221202013 is a deficient number, since it is larger than the sum of its proper divisors (1).

444221202013 is an equidigital number, since it uses as much as digits as its factorization.

444221202013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 444221202013 its reverse (310202122444), we get a palindrome (754423324457).

The spelling of 444221202013 in words is "four hundred forty-four billion, two hundred twenty-one million, two hundred two thousand, thirteen".