243131412031 has 2 divisors, whose sum is σ = 243131412032. Its totient is φ = 243131412030.

The previous prime is 243131412023. The next prime is 243131412089. The reversal of 243131412031 is 130214131342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243131412031 - 2³ = 243131412023 is a prime.

It is a super-2 number, since 2×243131412031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243131411987 and 243131412005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243131112031) 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, 121565706015 + 121565706016.

It is an arithmetic number, because the mean of its divisors is an integer number (121565706016).

Almost surely, 2^243131412031 is an apocalyptic number.

243131412031 is a deficient number, since it is larger than the sum of its proper divisors (1).

243131412031 is an equidigital number, since it uses as much as digits as its factorization.

243131412031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 243131412031 its reverse (130214131342), we get a palindrome (373345543373).

The spelling of 243131412031 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred twelve thousand, thirty-one".