231742543 has 2 divisors, whose sum is σ = 231742544. Its totient is φ = 231742542.

The previous prime is 231742541. The next prime is 231742573. The reversal of 231742543 is 345247132.

It is a happy number.

231742543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231742543 - 2¹ = 231742541 is a prime.

It is a super-2 number, since 2×231742543² = 107409212472213698, which contains 22 as substring.

Together with 231742541, 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 (231742541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115871271 + 115871272.

It is an arithmetic number, because the mean of its divisors is an integer number (115871272).

Almost surely, 2^231742543 is an apocalyptic number.

231742543 is a deficient number, since it is larger than the sum of its proper divisors (1).

231742543 is an equidigital number, since it uses as much as digits as its factorization.

231742543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 231742543 is about 15223.0924256539. The cubic root of 231742543 is about 614.2359851808.

Adding to 231742543 its reverse (345247132), we get a palindrome (576989675).

The spelling of 231742543 in words is "two hundred thirty-one million, seven hundred forty-two thousand, five hundred forty-three".