243131441999 has 2 divisors, whose sum is σ = 243131442000. Its totient is φ = 243131441998.

The previous prime is 243131441989. The next prime is 243131442013. The reversal of 243131441999 is 999144131342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243131441999 is a prime.

It is a super-2 number, since 2×243131441999² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243131441989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121565720999 + 121565721000.

It is an arithmetic number, because the mean of its divisors is an integer number (121565721000).

Almost surely, 2^243131441999 is an apocalyptic number.

243131441999 is a deficient number, since it is larger than the sum of its proper divisors (1).

243131441999 is an equidigital number, since it uses as much as digits as its factorization.

243131441999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The spelling of 243131441999 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-one thousand, nine hundred ninety-nine".