43344781217 has 2 divisors, whose sum is σ = 43344781218. Its totient is φ = 43344781216.

The previous prime is 43344781171. The next prime is 43344781253. The reversal of 43344781217 is 71218744334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35179128721 + 8165652496 = 187561^2 + 90364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43344781217 is a prime.

It is not a weakly prime, because it can be changed into another prime (43344780217) 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 as a sum of consecutive naturals, namely, 21672390608 + 21672390609.

It is an arithmetic number, because the mean of its divisors is an integer number (21672390609).

Almost surely, 2^43344781217 is an apocalyptic number.

It is an amenable number.

43344781217 is a deficient number, since it is larger than the sum of its proper divisors (1).

43344781217 is an equidigital number, since it uses as much as digits as its factorization.

43344781217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 44.

The spelling of 43344781217 in words is "forty-three billion, three hundred forty-four million, seven hundred eighty-one thousand, two hundred seventeen".