217888153211 has 2 divisors, whose sum is σ = 217888153212. Its totient is φ = 217888153210.

The previous prime is 217888153199. The next prime is 217888153253. The reversal of 217888153211 is 112351888712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217888153211 is a prime.

It is a super-2 number, since 2×217888153211² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217888153711) 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, 108944076605 + 108944076606.

It is an arithmetic number, because the mean of its divisors is an integer number (108944076606).

Almost surely, 2^217888153211 is an apocalyptic number.

217888153211 is a deficient number, since it is larger than the sum of its proper divisors (1).

217888153211 is an equidigital number, since it uses as much as digits as its factorization.

217888153211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 47.

The spelling of 217888153211 in words is "two hundred seventeen billion, eight hundred eighty-eight million, one hundred fifty-three thousand, two hundred eleven".