23217007543 has 4 divisors (see below), whose sum is σ = 24017594040. Its totient is φ = 22416421048.

The previous prime is 23217007531. The next prime is 23217007609. The reversal of 23217007543 is 34570071232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23217007543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23217007499 and 23217007508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23227007543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400293205 + ... + 400293262.

It is an arithmetic number, because the mean of its divisors is an integer number (6004398510).

Almost surely, 2^23217007543 is an apocalyptic number.

23217007543 is a deficient number, since it is larger than the sum of its proper divisors (800586497).

23217007543 is an equidigital number, since it uses as much as digits as its factorization.

23217007543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800586496.

The product of its (nonzero) digits is 35280, while the sum is 34.

Adding to 23217007543 its reverse (34570071232), we get a palindrome (57787078775).

The spelling of 23217007543 in words is "twenty-three billion, two hundred seventeen million, seven thousand, five hundred forty-three".