211205233 has 2 divisors, whose sum is σ = 211205234. Its totient is φ = 211205232.

The previous prime is 211205209. The next prime is 211205257. The reversal of 211205233 is 332502112.

It is a balanced prime because it is at equal distance from previous prime (211205209) and next prime (211205257).

It can be written as a sum of positive squares in only one way, i.e., 208167184 + 3038049 = 14428^2 + 1743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211205233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211205233.

It is not a weakly prime, because it can be changed into another prime (211205833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105602616 + 105602617.

It is an arithmetic number, because the mean of its divisors is an integer number (105602617).

Almost surely, 2^211205233 is an apocalyptic number.

It is an amenable number.

211205233 is a deficient number, since it is larger than the sum of its proper divisors (1).

211205233 is an equidigital number, since it uses as much as digits as its factorization.

211205233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 211205233 is about 14532.9017405334. The cubic root of 211205233 is about 595.5271396507.

Adding to 211205233 its reverse (332502112), we get a palindrome (543707345).

The spelling of 211205233 in words is "two hundred eleven million, two hundred five thousand, two hundred thirty-three".