231355543 has 2 divisors, whose sum is σ = 231355544. Its totient is φ = 231355542.

The previous prime is 231355541. The next prime is 231355603. The reversal of 231355543 is 345553132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231355543 - 2¹ = 231355541 is a prime.

Together with 231355541, 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 (231355541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115677771 + 115677772.

It is an arithmetic number, because the mean of its divisors is an integer number (115677772).

Almost surely, 2^231355543 is an apocalyptic number.

231355543 is a deficient number, since it is larger than the sum of its proper divisors (1).

231355543 is an equidigital number, since it uses as much as digits as its factorization.

231355543 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 231355543 is about 15210.3761623439. The cubic root of 231355543 is about 613.8938788538.

The spelling of 231355543 in words is "two hundred thirty-one million, three hundred fifty-five thousand, five hundred forty-three".