517801013 has 4 divisors (see below), whose sum is σ = 530430348. Its totient is φ = 505171680.

The previous prime is 517800979. The next prime is 517801019. The reversal of 517801013 is 310108715.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120077764 + 397723249 = 10958^2 + 19943^2 .

It is a cyclic number.

It is not a de Polignac number, because 517801013 - 2²⁰ = 516752437 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 (517801019) 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, 6314606 + ... + 6314687.

It is an arithmetic number, because the mean of its divisors is an integer number (132607587).

Almost surely, 2^517801013 is an apocalyptic number.

It is an amenable number.

517801013 is a deficient number, since it is larger than the sum of its proper divisors (12629335).

517801013 is a wasteful number, since it uses less digits than its factorization.

517801013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12629334.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 517801013 is about 22755.2414401606. The cubic root of 517801013 is about 803.0100214472.

Adding to 517801013 its reverse (310108715), we get a palindrome (827909728).

The spelling of 517801013 in words is "five hundred seventeen million, eight hundred one thousand, thirteen".