23115543 has 8 divisors (see below), whose sum is σ = 33622656. Its totient is φ = 14009400.

The previous prime is 23115539. The next prime is 23115559. The reversal of 23115543 is 34551132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23115543 - 2² = 23115539 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115503) 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 7 ways as a sum of consecutive naturals, for example, 350203 + ... + 350268.

It is an arithmetic number, because the mean of its divisors is an integer number (4202832).

Almost surely, 2^23115543 is an apocalyptic number.

23115543 is a deficient number, since it is larger than the sum of its proper divisors (10507113).

23115543 is a wasteful number, since it uses less digits than its factorization.

23115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700485.

The product of its digits is 1800, while the sum is 24.

The square root of 23115543 is about 4807.8626228294. The cubic root of 23115543 is about 284.8621185923.

Adding to 23115543 its reverse (34551132), we get a palindrome (57666675).

The spelling of 23115543 in words is "twenty-three million, one hundred fifteen thousand, five hundred forty-three".