243342221231 has 2 divisors, whose sum is σ = 243342221232. Its totient is φ = 243342221230.

The previous prime is 243342221197. The next prime is 243342221249. The reversal of 243342221231 is 132122243342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243342221231 - 2⁶ = 243342221167 is a prime.

It is a super-2 number, since 2×243342221231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243342221194 and 243342221203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243342227231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121671110615 + 121671110616.

It is an arithmetic number, because the mean of its divisors is an integer number (121671110616).

Almost surely, 2^243342221231 is an apocalyptic number.

243342221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243342221231 is an equidigital number, since it uses as much as digits as its factorization.

243342221231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 29.

Adding to 243342221231 its reverse (132122243342), we get a palindrome (375464464573).

The spelling of 243342221231 in words is "two hundred forty-three billion, three hundred forty-two million, two hundred twenty-one thousand, two hundred thirty-one".