43340487217 has 2 divisors, whose sum is σ = 43340487218. Its totient is φ = 43340487216.

The previous prime is 43340487199. The next prime is 43340487317. The reversal of 43340487217 is 71278404334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40423515136 + 2916972081 = 201056^2 + 54009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43340487217 is a prime.

It is not a weakly prime, because it can be changed into another prime (43340487017) 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, 21670243608 + 21670243609.

It is an arithmetic number, because the mean of its divisors is an integer number (21670243609).

Almost surely, 2^43340487217 is an apocalyptic number.

It is an amenable number.

43340487217 is a deficient number, since it is larger than the sum of its proper divisors (1).

43340487217 is an equidigital number, since it uses as much as digits as its factorization.

43340487217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 43340487217 in words is "forty-three billion, three hundred forty million, four hundred eighty-seven thousand, two hundred seventeen".