243213122237 has 2 divisors, whose sum is σ = 243213122238. Its totient is φ = 243213122236.

The previous prime is 243213122209. The next prime is 243213122263. The reversal of 243213122237 is 732221312342.

243213122237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132762581956 + 110450540281 = 364366^2 + 332341^2 .

It is a cyclic number.

It is not a de Polignac number, because 243213122237 - 2¹⁶ = 243213056701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213122137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606561118 + 121606561119.

It is an arithmetic number, because the mean of its divisors is an integer number (121606561119).

Almost surely, 2^243213122237 is an apocalyptic number.

It is an amenable number.

243213122237 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213122237 is an equidigital number, since it uses as much as digits as its factorization.

243213122237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 32.

Adding to 243213122237 its reverse (732221312342), we get a palindrome (975434434579).

The spelling of 243213122237 in words is "two hundred forty-three billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred thirty-seven".