243201423131 has 2 divisors, whose sum is σ = 243201423132. Its totient is φ = 243201423130.

The previous prime is 243201423109. The next prime is 243201423161. The reversal of 243201423131 is 131324102342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243201423131 is a prime.

It is a super-2 number, since 2×243201423131² (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 243201423131.

It is not a weakly prime, because it can be changed into another prime (243201423161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600711565 + 121600711566.

It is an arithmetic number, because the mean of its divisors is an integer number (121600711566).

Almost surely, 2^243201423131 is an apocalyptic number.

243201423131 is a deficient number, since it is larger than the sum of its proper divisors (1).

243201423131 is an equidigital number, since it uses as much as digits as its factorization.

243201423131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 243201423131 its reverse (131324102342), we get a palindrome (374525525473).

The spelling of 243201423131 in words is "two hundred forty-three billion, two hundred one million, four hundred twenty-three thousand, one hundred thirty-one".