23445543 has 16 divisors (see below), whose sum is σ = 35280000. Its totient is φ = 13718880.

The previous prime is 23445509. The next prime is 23445553. The reversal of 23445543 is 34554432.

It is not a de Polignac number, because 23445543 - 2⁸ = 23445287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23445543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23445553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11293 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^23445543 is an apocalyptic number.

23445543 is a deficient number, since it is larger than the sum of its proper divisors (11834457).

23445543 is a wasteful number, since it uses less digits than its factorization.

23445543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24542.

The product of its digits is 28800, while the sum is 30.

The square root of 23445543 is about 4842.0597889741. The cubic root of 23445543 is about 286.2112926692.

Adding to 23445543 its reverse (34554432), we get a palindrome (57999975).

Subtracting 23445543 from its reverse (34554432), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 2344 and 5543, that added together give a palindrome (7887).

The spelling of 23445543 in words is "twenty-three million, four hundred forty-five thousand, five hundred forty-three".