243421452331 has 2 divisors, whose sum is σ = 243421452332. Its totient is φ = 243421452330.

The previous prime is 243421452247. The next prime is 243421452341. The reversal of 243421452331 is 133254124342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243421452331 - 2¹³ = 243421444139 is a prime.

It is a super-2 number, since 2×243421452331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243421452341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710726165 + 121710726166.

It is an arithmetic number, because the mean of its divisors is an integer number (121710726166).

Almost surely, 2^243421452331 is an apocalyptic number.

243421452331 is a deficient number, since it is larger than the sum of its proper divisors (1).

243421452331 is an equidigital number, since it uses as much as digits as its factorization.

243421452331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 34.

Adding to 243421452331 its reverse (133254124342), we get a palindrome (376675576673).

The spelling of 243421452331 in words is "two hundred forty-three billion, four hundred twenty-one million, four hundred fifty-two thousand, three hundred thirty-one".