217450122653 has 2 divisors, whose sum is σ = 217450122654. Its totient is φ = 217450122652.

The previous prime is 217450122647. The next prime is 217450122667. The reversal of 217450122653 is 356221054712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116088755524 + 101361367129 = 340718^2 + 318373^2 .

It is a cyclic number.

It is not a de Polignac number, because 217450122653 - 2⁸ = 217450122397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217450122623) 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, 108725061326 + 108725061327.

It is an arithmetic number, because the mean of its divisors is an integer number (108725061327).

Almost surely, 2^217450122653 is an apocalyptic number.

It is an amenable number.

217450122653 is a deficient number, since it is larger than the sum of its proper divisors (1).

217450122653 is an equidigital number, since it uses as much as digits as its factorization.

217450122653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 217450122653 in words is "two hundred seventeen billion, four hundred fifty million, one hundred twenty-two thousand, six hundred fifty-three".