231441543211 has 2 divisors, whose sum is σ = 231441543212. Its totient is φ = 231441543210.

The previous prime is 231441543209. The next prime is 231441543217. The reversal of 231441543211 is 112345144132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231441543211 - 2¹ = 231441543209 is a prime.

Together with 231441543209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231441543217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115720771605 + 115720771606.

It is an arithmetic number, because the mean of its divisors is an integer number (115720771606).

Almost surely, 2^231441543211 is an apocalyptic number.

231441543211 is a deficient number, since it is larger than the sum of its proper divisors (1).

231441543211 is an equidigital number, since it uses as much as digits as its factorization.

231441543211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

Adding to 231441543211 its reverse (112345144132), we get a palindrome (343786687343).

The spelling of 231441543211 in words is "two hundred thirty-one billion, four hundred forty-one million, five hundred forty-three thousand, two hundred eleven".