23143543 has 4 divisors (see below), whose sum is σ = 24149808. Its totient is φ = 22137280.

The previous prime is 23143529. The next prime is 23143559. The reversal of 23143543 is 34534132.

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 23143543 - 2⁹ = 23143031 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 (23143513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503098 + ... + 503143.

It is an arithmetic number, because the mean of its divisors is an integer number (6037452).

Almost surely, 2^23143543 is an apocalyptic number.

23143543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23143543 is a deficient number, since it is larger than the sum of its proper divisors (1006265).

23143543 is a wasteful number, since it uses less digits than its factorization.

23143543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006264.

The product of its digits is 4320, while the sum is 25.

The square root of 23143543 is about 4810.7736384079. The cubic root of 23143543 is about 284.9770905972.

Adding to 23143543 its reverse (34534132), we get a palindrome (57677675).

It can be divided in two parts, 23 and 143543, that multiplied together give a square (3301489 = 1817²).

The spelling of 23143543 in words is "twenty-three million, one hundred forty-three thousand, five hundred forty-three".