212223133 has 2 divisors, whose sum is σ = 212223134. Its totient is φ = 212223132.

The previous prime is 212223097. The next prime is 212223149. The reversal of 212223133 is 331322212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133333209 + 78889924 = 11547^2 + 8882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212223133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212223133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212223163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111566 + 106111567.

It is an arithmetic number, because the mean of its divisors is an integer number (106111567).

Almost surely, 2^212223133 is an apocalyptic number.

It is an amenable number.

212223133 is a deficient number, since it is larger than the sum of its proper divisors (1).

212223133 is an equidigital number, since it uses as much as digits as its factorization.

212223133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 212223133 is about 14567.8801820992. The cubic root of 212223133 is about 596.4823177490.

Adding to 212223133 its reverse (331322212), we get a palindrome (543545345).

The spelling of 212223133 in words is "two hundred twelve million, two hundred twenty-three thousand, one hundred thirty-three".