212237243 has 2 divisors, whose sum is σ = 212237244. Its totient is φ = 212237242.

The previous prime is 212237237. The next prime is 212237251. The reversal of 212237243 is 342732212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212237243 - 2⁴ = 212237227 is a prime.

It is not a weakly prime, because it can be changed into another prime (212237203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106118621 + 106118622.

It is an arithmetic number, because the mean of its divisors is an integer number (106118622).

Almost surely, 2^212237243 is an apocalyptic number.

212237243 is a deficient number, since it is larger than the sum of its proper divisors (1).

212237243 is an equidigital number, since it uses as much as digits as its factorization.

212237243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 26.

The square root of 212237243 is about 14568.3644586481. The cubic root of 212237243 is about 596.4955368216.

Adding to 212237243 its reverse (342732212), we get a palindrome (554969455).

The spelling of 212237243 in words is "two hundred twelve million, two hundred thirty-seven thousand, two hundred forty-three".