219116354309 has 2 divisors, whose sum is σ = 219116354310. Its totient is φ = 219116354308.

The previous prime is 219116354297. The next prime is 219116354311. The reversal of 219116354309 is 903453611912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202789903684 + 16326450625 = 450322^2 + 127775^2 .

It is a cyclic number.

It is not a de Polignac number, because 219116354309 - 2⁴ = 219116354293 is a prime.

Together with 219116354311, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219116354309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219116354339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109558177154 + 109558177155.

It is an arithmetic number, because the mean of its divisors is an integer number (109558177155).

Almost surely, 2^219116354309 is an apocalyptic number.

It is an amenable number.

219116354309 is a deficient number, since it is larger than the sum of its proper divisors (1).

219116354309 is an equidigital number, since it uses as much as digits as its factorization.

219116354309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 219116354309 in words is "two hundred nineteen billion, one hundred sixteen million, three hundred fifty-four thousand, three hundred nine".