217730539219 has 2 divisors, whose sum is σ = 217730539220. Its totient is φ = 217730539218.

The previous prime is 217730539207. The next prime is 217730539303. The reversal of 217730539219 is 912935037712.

It is a happy number.

217730539219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217730539219 is a prime.

It is a super-2 number, since 2×217730539219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217730539619) 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, 108865269609 + 108865269610.

It is an arithmetic number, because the mean of its divisors is an integer number (108865269610).

Almost surely, 2^217730539219 is an apocalyptic number.

217730539219 is a deficient number, since it is larger than the sum of its proper divisors (1).

217730539219 is an equidigital number, since it uses as much as digits as its factorization.

217730539219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 49.

The spelling of 217730539219 in words is "two hundred seventeen billion, seven hundred thirty million, five hundred thirty-nine thousand, two hundred nineteen".