23140543 has 4 divisors (see below), whose sum is σ = 23322880. Its totient is φ = 22958208.

The previous prime is 23140531. The next prime is 23140571. The reversal of 23140543 is 34504132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23140543 - 2²¹ = 21043391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23147543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90978 + ... + 91231.

It is an arithmetic number, because the mean of its divisors is an integer number (5830720).

Almost surely, 2^23140543 is an apocalyptic number.

23140543 is a deficient number, since it is larger than the sum of its proper divisors (182337).

23140543 is a wasteful number, since it uses less digits than its factorization.

23140543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182336.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 23140543 is about 4810.4618281408. The cubic root of 23140543 is about 284.9647766051.

Adding to 23140543 its reverse (34504132), we get a palindrome (57644675).

The spelling of 23140543 in words is "twenty-three million, one hundred forty thousand, five hundred forty-three".