442421310209 has 2 divisors, whose sum is σ = 442421310210. Its totient is φ = 442421310208.

The previous prime is 442421310203. The next prime is 442421310251. The reversal of 442421310209 is 902013124244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365816909584 + 76604400625 = 604828^2 + 276775^2 .

It is a cyclic number.

It is not a de Polignac number, because 442421310209 - 2²⁸ = 442152874753 is a prime.

It is not a weakly prime, because it can be changed into another prime (442421310203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221210655104 + 221210655105.

It is an arithmetic number, because the mean of its divisors is an integer number (221210655105).

Almost surely, 2^442421310209 is an apocalyptic number.

It is an amenable number.

442421310209 is a deficient number, since it is larger than the sum of its proper divisors (1).

442421310209 is an equidigital number, since it uses as much as digits as its factorization.

442421310209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 442421310209 in words is "four hundred forty-two billion, four hundred twenty-one million, three hundred ten thousand, two hundred nine".