173217112643 has 4 divisors (see below), whose sum is σ = 173619008928. Its totient is φ = 172815216360.

The previous prime is 173217112637. The next prime is 173217112667. The reversal of 173217112643 is 346211712371.

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

It is a cyclic number.

It is not a de Polignac number, because 173217112643 - 2²⁰ = 173216064067 is a prime.

It is a super-2 number, since 2×173217112643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 173217112597 and 173217112606.

It is not an unprimeable number, because it can be changed into a prime (173217132643) 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, 200947496 + ... + 200948357.

It is an arithmetic number, because the mean of its divisors is an integer number (43404752232).

Almost surely, 2^173217112643 is an apocalyptic number.

173217112643 is a deficient number, since it is larger than the sum of its proper divisors (401896285).

173217112643 is an equidigital number, since it uses as much as digits as its factorization.

173217112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401896284.

The product of its digits is 42336, while the sum is 38.

The spelling of 173217112643 in words is "one hundred seventy-three billion, two hundred seventeen million, one hundred twelve thousand, six hundred forty-three".