212230237 has 2 divisors, whose sum is σ = 212230238. Its totient is φ = 212230236.

The previous prime is 212230211. The next prime is 212230243. The reversal of 212230237 is 732032212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173554276 + 38675961 = 13174^2 + 6219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212230237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212230297) 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, 106115118 + 106115119.

It is an arithmetic number, because the mean of its divisors is an integer number (106115119).

Almost surely, 2^212230237 is an apocalyptic number.

It is an amenable number.

212230237 is a deficient number, since it is larger than the sum of its proper divisors (1).

212230237 is an equidigital number, since it uses as much as digits as its factorization.

212230237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 212230237 is about 14568.1240041400. The cubic root of 212230237 is about 596.4889732646.

Adding to 212230237 its reverse (732032212), we get a palindrome (944262449).

The spelling of 212230237 in words is "two hundred twelve million, two hundred thirty thousand, two hundred thirty-seven".