219491393353 has 2 divisors, whose sum is σ = 219491393354. Its totient is φ = 219491393352.

The previous prime is 219491393351. The next prime is 219491393369. The reversal of 219491393353 is 353393194912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141039304704 + 78452088649 = 375552^2 + 280093^2 .

It is a cyclic number.

It is not a de Polignac number, because 219491393353 - 2¹ = 219491393351 is a prime.

Together with 219491393351, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 219491393353.

It is not a weakly prime, because it can be changed into another prime (219491393351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109745696676 + 109745696677.

It is an arithmetic number, because the mean of its divisors is an integer number (109745696677).

Almost surely, 2^219491393353 is an apocalyptic number.

It is an amenable number.

219491393353 is a deficient number, since it is larger than the sum of its proper divisors (1).

219491393353 is an equidigital number, since it uses as much as digits as its factorization.

219491393353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 52.

The spelling of 219491393353 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, three hundred fifty-three".