212320237 has 2 divisors, whose sum is σ = 212320238. Its totient is φ = 212320236.

The previous prime is 212320219. The next prime is 212320243. The reversal of 212320237 is 732023212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126090441 + 86229796 = 11229^2 + 9286^2 .

It is a cyclic number.

It is not a de Polignac number, because 212320237 - 2¹¹ = 212318189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212320217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160118 + 106160119.

It is an arithmetic number, because the mean of its divisors is an integer number (106160119).

Almost surely, 2^212320237 is an apocalyptic number.

It is an amenable number.

212320237 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320237 is an equidigital number, since it uses as much as digits as its factorization.

212320237 is an evil number, because the sum of its binary digits is even.

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

The square root of 212320237 is about 14571.2126125453. The cubic root of 212320237 is about 596.5732785951.

Adding to 212320237 its reverse (732023212), we get a palindrome (944343449).

The spelling of 212320237 in words is "two hundred twelve million, three hundred twenty thousand, two hundred thirty-seven".