320220173 has 16 divisors (see below), whose sum is σ = 406834176. Its totient is φ = 245185920.

The previous prime is 320220157. The next prime is 320220181. The reversal of 320220173 is 371022023.

It is not a de Polignac number, because 320220173 - 2⁴ = 320220157 is a prime.

It is a super-2 number, since 2×320220173² = 205081918392299858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320220193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53936 + ... + 59577.

It is an arithmetic number, because the mean of its divisors is an integer number (25427136).

Almost surely, 2^320220173 is an apocalyptic number.

It is an amenable number.

320220173 is a deficient number, since it is larger than the sum of its proper divisors (86614003).

320220173 is a wasteful number, since it uses less digits than its factorization.

320220173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113564.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 320220173 is about 17894.6967842431. The cubic root of 320220173 is about 684.1472137624.

Adding to 320220173 its reverse (371022023), we get a palindrome (691242196).

The spelling of 320220173 in words is "three hundred twenty million, two hundred twenty thousand, one hundred seventy-three".