231133543 has 2 divisors, whose sum is σ = 231133544. Its totient is φ = 231133542.

The previous prime is 231133541. The next prime is 231133579. The reversal of 231133543 is 345331132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231133543 - 2¹ = 231133541 is a prime.

Together with 231133541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231133541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566771 + 115566772.

It is an arithmetic number, because the mean of its divisors is an integer number (115566772).

Almost surely, 2^231133543 is an apocalyptic number.

231133543 is a deficient number, since it is larger than the sum of its proper divisors (1).

231133543 is an equidigital number, since it uses as much as digits as its factorization.

231133543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 25.

The square root of 231133543 is about 15203.0767609718. The cubic root of 231133543 is about 613.6974595912.

Adding to 231133543 its reverse (345331132), we get a palindrome (576464675).

The spelling of 231133543 in words is "two hundred thirty-one million, one hundred thirty-three thousand, five hundred forty-three".