243031231231 has 2 divisors, whose sum is σ = 243031231232. Its totient is φ = 243031231230.

The previous prime is 243031231217. The next prime is 243031231253. The reversal of 243031231231 is 132132130342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243031231231 - 2⁷ = 243031231103 is a prime.

It is a super-2 number, since 2×243031231231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243031231196 and 243031231205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243031231271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121515615615 + 121515615616.

It is an arithmetic number, because the mean of its divisors is an integer number (121515615616).

Almost surely, 2^243031231231 is an apocalyptic number.

243031231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243031231231 is an equidigital number, since it uses as much as digits as its factorization.

243031231231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 243031231231 its reverse (132132130342), we get a palindrome (375163361573).

The spelling of 243031231231 in words is "two hundred forty-three billion, thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".