72220173 has 8 divisors (see below), whose sum is σ = 99399936. Its totient is φ = 46593600.

The previous prime is 72220123. The next prime is 72220217. The reversal of 72220173 is 37102227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-72220173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388188 + ... + 388373.

It is an arithmetic number, because the mean of its divisors is an integer number (12424992).

Almost surely, 2^72220173 is an apocalyptic number.

It is an amenable number.

72220173 is a deficient number, since it is larger than the sum of its proper divisors (27179763).

72220173 is a wasteful number, since it uses less digits than its factorization.

72220173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776595.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 72220173 is about 8498.2452894701. The cubic root of 72220173 is about 416.4403870741.

The spelling of 72220173 in words is "seventy-two million, two hundred twenty thousand, one hundred seventy-three".