219913666057 has 2 divisors, whose sum is σ = 219913666058. Its totient is φ = 219913666056.

The previous prime is 219913666033. The next prime is 219913666067. The reversal of 219913666057 is 750666319912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218602067401 + 1311598656 = 467549^2 + 36216^2 .

It is a cyclic number.

It is not a de Polignac number, because 219913666057 - 2³¹ = 217766182409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 219913665989 and 219913666007.

It is not a weakly prime, because it can be changed into another prime (219913666067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109956833028 + 109956833029.

It is an arithmetic number, because the mean of its divisors is an integer number (109956833029).

Almost surely, 2^219913666057 is an apocalyptic number.

It is an amenable number.

219913666057 is a deficient number, since it is larger than the sum of its proper divisors (1).

219913666057 is an equidigital number, since it uses as much as digits as its factorization.

219913666057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 219913666057 in words is "two hundred nineteen billion, nine hundred thirteen million, six hundred sixty-six thousand, fifty-seven".