520081507173 has 4 divisors (see below), whose sum is σ = 693442009568. Its totient is φ = 346721004780.

The previous prime is 520081507133. The next prime is 520081507177. The reversal of 520081507173 is 371705180025.

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 not a de Polignac number, because 520081507173 - 2⁹ = 520081506661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520081507177) 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, 86680251193 + ... + 86680251198.

It is an arithmetic number, because the mean of its divisors is an integer number (173360502392).

Almost surely, 2^520081507173 is an apocalyptic number.

It is an amenable number.

520081507173 is a deficient number, since it is larger than the sum of its proper divisors (173360502395).

520081507173 is a wasteful number, since it uses less digits than its factorization.

520081507173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173360502394.

The product of its (nonzero) digits is 58800, while the sum is 39.

Adding to 520081507173 its reverse (371705180025), we get a palindrome (891786687198).

The spelling of 520081507173 in words is "five hundred twenty billion, eighty-one million, five hundred seven thousand, one hundred seventy-three".