517080221 has 4 divisors (see below), whose sum is σ = 590948832. Its totient is φ = 443211612.

The previous prime is 517080209. The next prime is 517080241. The reversal of 517080221 is 122080715.

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 517080221 - 2¹⁴ = 517063837 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 (517080241) 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, 36934295 + ... + 36934308.

It is an arithmetic number, because the mean of its divisors is an integer number (147737208).

Almost surely, 2^517080221 is an apocalyptic number.

It is an amenable number.

517080221 is a deficient number, since it is larger than the sum of its proper divisors (73868611).

517080221 is an equidigital number, since it uses as much as digits as its factorization.

517080221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73868610.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 517080221 is about 22739.3979911518. The cubic root of 517080221 is about 802.6372450574.

The spelling of 517080221 in words is "five hundred seventeen million, eighty thousand, two hundred twenty-one".