222491891689 has 2 divisors, whose sum is σ = 222491891690. Its totient is φ = 222491891688.

The previous prime is 222491891641. The next prime is 222491891747. The reversal of 222491891689 is 986198194222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217708094464 + 4783797225 = 466592^2 + 69165^2 .

It is a cyclic number.

It is not a de Polignac number, because 222491891689 - 2⁷ = 222491891561 is a prime.

It is not a weakly prime, because it can be changed into another prime (222491891639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111245945844 + 111245945845.

It is an arithmetic number, because the mean of its divisors is an integer number (111245945845).

Almost surely, 2^222491891689 is an apocalyptic number.

It is an amenable number.

222491891689 is a deficient number, since it is larger than the sum of its proper divisors (1).

222491891689 is an equidigital number, since it uses as much as digits as its factorization.

222491891689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 61.

The spelling of 222491891689 in words is "two hundred twenty-two billion, four hundred ninety-one million, eight hundred ninety-one thousand, six hundred eighty-nine".