243424440131 has 2 divisors, whose sum is σ = 243424440132. Its totient is φ = 243424440130.

The previous prime is 243424440109. The next prime is 243424440139. The reversal of 243424440131 is 131044424342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243424440131 is a prime.

It is a super-2 number, since 2×243424440131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243424440139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121712220065 + 121712220066.

It is an arithmetic number, because the mean of its divisors is an integer number (121712220066).

Almost surely, 2^243424440131 is an apocalyptic number.

243424440131 is a deficient number, since it is larger than the sum of its proper divisors (1).

243424440131 is an equidigital number, since it uses as much as digits as its factorization.

243424440131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 243424440131 its reverse (131044424342), we get a palindrome (374468864473).

The spelling of 243424440131 in words is "two hundred forty-three billion, four hundred twenty-four million, four hundred forty thousand, one hundred thirty-one".