219491393053 has 2 divisors, whose sum is σ = 219491393054. Its totient is φ = 219491393052.

The previous prime is 219491392999. The next prime is 219491393087. The reversal of 219491393053 is 350393194912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214875821209 + 4615571844 = 463547^2 + 67938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219491393053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 219491392988 and 219491393006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219491393353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109745696526 + 109745696527.

It is an arithmetic number, because the mean of its divisors is an integer number (109745696527).

Almost surely, 2^219491393053 is an apocalyptic number.

It is an amenable number.

219491393053 is a deficient number, since it is larger than the sum of its proper divisors (1).

219491393053 is an equidigital number, since it uses as much as digits as its factorization.

219491393053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 219491393053 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, fifty-three".