211323017 has 2 divisors, whose sum is σ = 211323018. Its totient is φ = 211323016.

The previous prime is 211322989. The next prime is 211323037. The reversal of 211323017 is 710323112.

It is an a-pointer prime, because the next prime (211323037) can be obtained adding 211323017 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211149961 + 173056 = 14531^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 211323017 - 2¹⁰ = 211321993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211323017.

It is not a weakly prime, because it can be changed into another prime (211323037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105661508 + 105661509.

It is an arithmetic number, because the mean of its divisors is an integer number (105661509).

Almost surely, 2^211323017 is an apocalyptic number.

It is an amenable number.

211323017 is a deficient number, since it is larger than the sum of its proper divisors (1).

211323017 is an equidigital number, since it uses as much as digits as its factorization.

211323017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 211323017 is about 14536.9534978963. The cubic root of 211323017 is about 595.6378227250.

Adding to 211323017 its reverse (710323112), we get a palindrome (921646129).

The spelling of 211323017 in words is "two hundred eleven million, three hundred twenty-three thousand, seventeen".