23555543 has 4 divisors (see below), whose sum is σ = 25696968. Its totient is φ = 21414120.

The previous prime is 23555533. The next prime is 23555551. The reversal of 23555543 is 34555532.

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 23555543 - 2¹⁰ = 23554519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070696 + ... + 1070717.

It is an arithmetic number, because the mean of its divisors is an integer number (6424242).

Almost surely, 2^23555543 is an apocalyptic number.

23555543 is a deficient number, since it is larger than the sum of its proper divisors (2141425).

23555543 is a wasteful number, since it uses less digits than its factorization.

23555543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141424.

The product of its digits is 45000, while the sum is 32.

The square root of 23555543 is about 4853.4052993749. The cubic root of 23555543 is about 286.6582025324.

The spelling of 23555543 in words is "twenty-three million, five hundred fifty-five thousand, five hundred forty-three".