243420132331 has 2 divisors, whose sum is σ = 243420132332. Its totient is φ = 243420132330.

The previous prime is 243420132317. The next prime is 243420132379. The reversal of 243420132331 is 133231024342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243420132331 - 2¹⁵ = 243420099563 is a prime.

It is a super-2 number, since 2×243420132331² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243420132331.

It is not a weakly prime, because it can be changed into another prime (243420132311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710066165 + 121710066166.

It is an arithmetic number, because the mean of its divisors is an integer number (121710066166).

Almost surely, 2^243420132331 is an apocalyptic number.

243420132331 is a deficient number, since it is larger than the sum of its proper divisors (1).

243420132331 is an equidigital number, since it uses as much as digits as its factorization.

243420132331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 243420132331 its reverse (133231024342), we get a palindrome (376651156673).

The spelling of 243420132331 in words is "two hundred forty-three billion, four hundred twenty million, one hundred thirty-two thousand, three hundred thirty-one".