217297583441 has 2 divisors, whose sum is σ = 217297583442. Its totient is φ = 217297583440.

The previous prime is 217297583411. The next prime is 217297583491. The reversal of 217297583441 is 144385792712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148860930625 + 68436652816 = 385825^2 + 261604^2 .

It is a cyclic number.

It is not a de Polignac number, because 217297583441 - 2³⁴ = 200117714257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (217297583411) 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, 108648791720 + 108648791721.

It is an arithmetic number, because the mean of its divisors is an integer number (108648791721).

Almost surely, 2^217297583441 is an apocalyptic number.

It is an amenable number.

217297583441 is a deficient number, since it is larger than the sum of its proper divisors (1).

217297583441 is an equidigital number, since it uses as much as digits as its factorization.

217297583441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 53.

The spelling of 217297583441 in words is "two hundred seventeen billion, two hundred ninety-seven million, five hundred eighty-three thousand, four hundred forty-one".