42443855317 has 2 divisors, whose sum is σ = 42443855318. Its totient is φ = 42443855316.

The previous prime is 42443855287. The next prime is 42443855369. The reversal of 42443855317 is 71355834424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39588662961 + 2855192356 = 198969^2 + 53434^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443855317 - 2¹¹ = 42443853269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42443855017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221927658 + 21221927659.

It is an arithmetic number, because the mean of its divisors is an integer number (21221927659).

Almost surely, 2^42443855317 is an apocalyptic number.

It is an amenable number.

42443855317 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443855317 is an equidigital number, since it uses as much as digits as its factorization.

42443855317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 46.

The spelling of 42443855317 in words is "forty-two billion, four hundred forty-three million, eight hundred fifty-five thousand, three hundred seventeen".