23555421143 has 4 divisors (see below), whose sum is σ = 23556646728. Its totient is φ = 23554195560.

The previous prime is 23555421103. The next prime is 23555421151. The reversal of 23555421143 is 34112455532.

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 23555421143 - 2²⁴ = 23538643927 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 (23555421103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583496 + ... + 622557.

It is an arithmetic number, because the mean of its divisors is an integer number (5889161682).

Almost surely, 2^23555421143 is an apocalyptic number.

23555421143 is a deficient number, since it is larger than the sum of its proper divisors (1225585).

23555421143 is a wasteful number, since it uses less digits than its factorization.

23555421143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225584.

The product of its digits is 72000, while the sum is 35.

Adding to 23555421143 its reverse (34112455532), we get a palindrome (57667876675).

The spelling of 23555421143 in words is "twenty-three billion, five hundred fifty-five million, four hundred twenty-one thousand, one hundred forty-three".