211423305617 has 2 divisors, whose sum is σ = 211423305618. Its totient is φ = 211423305616.

The previous prime is 211423305593. The next prime is 211423305641. The reversal of 211423305617 is 716503324112.

It is a balanced prime because it is at equal distance from previous prime (211423305593) and next prime (211423305641).

It can be written as a sum of positive squares in only one way, i.e., 155106794896 + 56316510721 = 393836^2 + 237311^2 .

It is a cyclic number.

It is not a de Polignac number, because 211423305617 - 2⁸ = 211423305361 is a prime.

It is not a weakly prime, because it can be changed into another prime (211423305517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105711652808 + 105711652809.

It is an arithmetic number, because the mean of its divisors is an integer number (105711652809).

Almost surely, 2^211423305617 is an apocalyptic number.

It is an amenable number.

211423305617 is a deficient number, since it is larger than the sum of its proper divisors (1).

211423305617 is an equidigital number, since it uses as much as digits as its factorization.

211423305617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 211423305617 its reverse (716503324112), we get a palindrome (927926629729).

The spelling of 211423305617 in words is "two hundred eleven billion, four hundred twenty-three million, three hundred five thousand, six hundred seventeen".