219921228743 has 2 divisors, whose sum is σ = 219921228744. Its totient is φ = 219921228742.

The previous prime is 219921228721. The next prime is 219921228847. The reversal of 219921228743 is 347822129912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 219921228743 - 2²⁰ = 219920180167 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 219921228691 and 219921228700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219921228643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109960614371 + 109960614372.

It is an arithmetic number, because the mean of its divisors is an integer number (109960614372).

Almost surely, 2^219921228743 is an apocalyptic number.

219921228743 is a deficient number, since it is larger than the sum of its proper divisors (1).

219921228743 is an equidigital number, since it uses as much as digits as its factorization.

219921228743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The spelling of 219921228743 in words is "two hundred nineteen billion, nine hundred twenty-one million, two hundred twenty-eight thousand, seven hundred forty-three".