517423603213 has 4 divisors (see below), whose sum is σ = 564462112608. Its totient is φ = 470385093820.

The previous prime is 517423603189. The next prime is 517423603241. The reversal of 517423603213 is 312306324715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 517423603213 - 2⁵ = 517423603181 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 (517423603243) 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, 23519254681 + ... + 23519254702.

It is an arithmetic number, because the mean of its divisors is an integer number (141115528152).

Almost surely, 2^517423603213 is an apocalyptic number.

It is an amenable number.

517423603213 is a deficient number, since it is larger than the sum of its proper divisors (47038509395).

517423603213 is a wasteful number, since it uses less digits than its factorization.

517423603213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47038509394.

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 517423603213 its reverse (312306324715), we get a palindrome (829729927928).

The spelling of 517423603213 in words is "five hundred seventeen billion, four hundred twenty-three million, six hundred three thousand, two hundred thirteen".