517173245 has 8 divisors (see below), whose sum is σ = 629109816. Its totient is φ = 408070656.

The previous prime is 517173199. The next prime is 517173247. The reversal of 517173245 is 542371715.

It can be written as a sum of positive squares in 4 ways, for example, as 183087961 + 334085284 = 13531^2 + 18278^2 .

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 517173245 - 2¹⁰ = 517172221 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 (517173247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708092 + ... + 708821.

It is an arithmetic number, because the mean of its divisors is an integer number (78638727).

Almost surely, 2^517173245 is an apocalyptic number.

It is an amenable number.

517173245 is a deficient number, since it is larger than the sum of its proper divisors (111936571).

517173245 is a wasteful number, since it uses less digits than its factorization.

517173245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416991.

The product of its digits is 29400, while the sum is 35.

The square root of 517173245 is about 22741.4433359011. The cubic root of 517173245 is about 802.6853743077.

The spelling of 517173245 in words is "five hundred seventeen million, one hundred seventy-three thousand, two hundred forty-five".