23217705517 has 8 divisors (see below), whose sum is σ = 23258244600. Its totient is φ = 23177193984.

The previous prime is 23217705479. The next prime is 23217705521. The reversal of 23217705517 is 71550771232.

It can be written as a sum of positive squares in 4 ways, for example, as 6221107876 + 16996597641 = 78874^2 + 130371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23217705517 - 2¹⁵ = 23217672749 is a prime.

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 23217705517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23227705517) 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 7 ways as a sum of consecutive naturals, for example, 2333409 + ... + 2343337.

It is an arithmetic number, because the mean of its divisors is an integer number (2907280575).

Almost surely, 2^23217705517 is an apocalyptic number.

It is an amenable number.

23217705517 is a deficient number, since it is larger than the sum of its proper divisors (40539083).

23217705517 is an equidigital number, since it uses as much as digits as its factorization.

23217705517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13775.

The product of its (nonzero) digits is 102900, while the sum is 40.

The spelling of 23217705517 in words is "twenty-three billion, two hundred seventeen million, seven hundred five thousand, five hundred seventeen".