217275517211 has 2 divisors, whose sum is σ = 217275517212. Its totient is φ = 217275517210.

The previous prime is 217275517201. The next prime is 217275517231. The reversal of 217275517211 is 112715572712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217275517211 is a prime.

It is not a weakly prime, because it can be changed into another prime (217275517201) 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, 108637758605 + 108637758606.

It is an arithmetic number, because the mean of its divisors is an integer number (108637758606).

Almost surely, 2^217275517211 is an apocalyptic number.

217275517211 is a deficient number, since it is larger than the sum of its proper divisors (1).

217275517211 is an equidigital number, since it uses as much as digits as its factorization.

217275517211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68600, while the sum is 41.

The spelling of 217275517211 in words is "two hundred seventeen billion, two hundred seventy-five million, five hundred seventeen thousand, two hundred eleven".