23403115543 has 4 divisors (see below), whose sum is σ = 23947374088. Its totient is φ = 22858857000.

The previous prime is 23403115523. The next prime is 23403115559. The reversal of 23403115543 is 34551130432.

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 23403115543 - 2⁵ = 23403115511 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 (23403115523) 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, 272129208 + ... + 272129293.

It is an arithmetic number, because the mean of its divisors is an integer number (5986843522).

Almost surely, 2^23403115543 is an apocalyptic number.

23403115543 is a deficient number, since it is larger than the sum of its proper divisors (544258545).

23403115543 is an equidigital number, since it uses as much as digits as its factorization.

23403115543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544258544.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 23403115543 its reverse (34551130432), we get a palindrome (57954245975).

The spelling of 23403115543 in words is "twenty-three billion, four hundred three million, one hundred fifteen thousand, five hundred forty-three".