23513224321 has 4 divisors (see below), whose sum is σ = 23525779972. Its totient is φ = 23500668672.

The previous prime is 23513224309. The next prime is 23513224333. The reversal of 23513224321 is 12342231532.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23513224309) and next prime (23513224333).

It can be written as a sum of positive squares in 2 ways, for example, as 1637335296 + 21875889025 = 40464^2 + 147905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23513224321 is a prime.

It is a super-2 number, since 2×23513224321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23513224321.

It is not an unprimeable number, because it can be changed into a prime (23513224381) 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, 6275016 + ... + 6278761.

It is an arithmetic number, because the mean of its divisors is an integer number (5881444993).

Almost surely, 2^23513224321 is an apocalyptic number.

It is an amenable number.

23513224321 is a deficient number, since it is larger than the sum of its proper divisors (12555651).

23513224321 is a wasteful number, since it uses less digits than its factorization.

23513224321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12555650.

The product of its digits is 8640, while the sum is 28.

Adding to 23513224321 its reverse (12342231532), we get a palindrome (35855455853).

The spelling of 23513224321 in words is "twenty-three billion, five hundred thirteen million, two hundred twenty-four thousand, three hundred twenty-one".