243131442131 has 2 divisors, whose sum is σ = 243131442132. Its totient is φ = 243131442130.

The previous prime is 243131442121. The next prime is 243131442137. The reversal of 243131442131 is 131244131342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243131442131 - 2⁶ = 243131442067 is a prime.

It is a super-2 number, since 2×243131442131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243131442094 and 243131442103.

It is not a weakly prime, because it can be changed into another prime (243131442137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121565721065 + 121565721066.

It is an arithmetic number, because the mean of its divisors is an integer number (121565721066).

Almost surely, 2^243131442131 is an apocalyptic number.

243131442131 is a deficient number, since it is larger than the sum of its proper divisors (1).

243131442131 is an equidigital number, since it uses as much as digits as its factorization.

243131442131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

Adding to 243131442131 its reverse (131244131342), we get a palindrome (374375573473).

The spelling of 243131442131 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred thirty-one".