212213143 has 2 divisors, whose sum is σ = 212213144. Its totient is φ = 212213142.

The previous prime is 212213129. The next prime is 212213149. The reversal of 212213143 is 341312212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212213143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212213143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212213149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106571 + 106106572.

It is an arithmetic number, because the mean of its divisors is an integer number (106106572).

Almost surely, 2^212213143 is an apocalyptic number.

212213143 is a deficient number, since it is larger than the sum of its proper divisors (1).

212213143 is an equidigital number, since it uses as much as digits as its factorization.

212213143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 212213143 is about 14567.5373004499. The cubic root of 212213143 is about 596.4729581790.

Adding to 212213143 its reverse (341312212), we get a palindrome (553525355).

The spelling of 212213143 in words is "two hundred twelve million, two hundred thirteen thousand, one hundred forty-three".