517173421 has 8 divisors (see below), whose sum is σ = 525530880. Its totient is φ = 508861392.

The previous prime is 517173401. The next prime is 517173431. The reversal of 517173421 is 124371715.

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 517173421 - 2¹⁵ = 517140653 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 (517173401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11976 + ... + 34318.

It is an arithmetic number, because the mean of its divisors is an integer number (65691360).

Almost surely, 2^517173421 is an apocalyptic number.

It is an amenable number.

517173421 is a deficient number, since it is larger than the sum of its proper divisors (8357459).

517173421 is a wasteful number, since it uses less digits than its factorization.

517173421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22715.

The product of its digits is 5880, while the sum is 31.

The square root of 517173421 is about 22741.4472054880. The cubic root of 517173421 is about 802.6854653620.

The spelling of 517173421 in words is "five hundred seventeen million, one hundred seventy-three thousand, four hundred twenty-one".