231535543 has 2 divisors, whose sum is σ = 231535544. Its totient is φ = 231535542.

The previous prime is 231535541. The next prime is 231535571. The reversal of 231535543 is 345535132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231535543 - 2¹ = 231535541 is a prime.

Together with 231535541, 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 (231535541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115767771 + 115767772.

It is an arithmetic number, because the mean of its divisors is an integer number (115767772).

Almost surely, 2^231535543 is an apocalyptic number.

231535543 is a deficient number, since it is larger than the sum of its proper divisors (1).

231535543 is an equidigital number, since it uses as much as digits as its factorization.

231535543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 31.

The square root of 231535543 is about 15216.2920253260. The cubic root of 231535543 is about 614.0530454937.

The spelling of 231535543 in words is "two hundred thirty-one million, five hundred thirty-five thousand, five hundred forty-three".