23221013543 has 64 divisors (see below), whose sum is σ = 30269030400. Its totient is φ = 17425549440.

The previous prime is 23221013521. The next prime is 23221013561. The reversal of 23221013543 is 34531012232.

It is a happy number.

It is not a de Polignac number, because 23221013543 - 2⁶ = 23221013479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221013573) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25267238 + ... + 25268156.

It is an arithmetic number, because the mean of its divisors is an integer number (472953600).

Almost surely, 2^23221013543 is an apocalyptic number.

23221013543 is a deficient number, since it is larger than the sum of its proper divisors (7048016857).

23221013543 is an equidigital number, since it uses as much as digits as its factorization.

23221013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 23221013543 its reverse (34531012232), we get a palindrome (57752025775).

The spelling of 23221013543 in words is "twenty-three billion, two hundred twenty-one million, thirteen thousand, five hundred forty-three".