217450122667 has 2 divisors, whose sum is σ = 217450122668. Its totient is φ = 217450122666.

The previous prime is 217450122653. The next prime is 217450122677. The reversal of 217450122667 is 766221054712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217450122667 is a prime.

It is not a weakly prime, because it can be changed into another prime (217450122647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108725061333 + 108725061334.

It is an arithmetic number, because the mean of its divisors is an integer number (108725061334).

Almost surely, 2^217450122667 is an apocalyptic number.

217450122667 is a deficient number, since it is larger than the sum of its proper divisors (1).

217450122667 is an equidigital number, since it uses as much as digits as its factorization.

217450122667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 217450122667 in words is "two hundred seventeen billion, four hundred fifty million, one hundred twenty-two thousand, six hundred sixty-seven".