211568117 has 2 divisors, whose sum is σ = 211568118. Its totient is φ = 211568116.

The previous prime is 211568107. The next prime is 211568167. The reversal of 211568117 is 711865112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181548676 + 30019441 = 13474^2 + 5479^2 .

It is a cyclic number.

It is not a de Polignac number, because 211568117 - 2⁸ = 211567861 is a prime.

It is a super-2 number, since 2×211568117² = 89522136261851378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211568107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105784058 + 105784059.

It is an arithmetic number, because the mean of its divisors is an integer number (105784059).

Almost surely, 2^211568117 is an apocalyptic number.

It is an amenable number.

211568117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211568117 is an equidigital number, since it uses as much as digits as its factorization.

211568117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 32.

The square root of 211568117 is about 14545.3812944178. The cubic root of 211568117 is about 595.8680144429.

The spelling of 211568117 in words is "two hundred eleven million, five hundred sixty-eight thousand, one hundred seventeen".