172273922 has 6 divisors (see below), whose sum is σ = 258438729. Its totient is φ = 86127680.

The previous prime is 172273921. The next prime is 172273963. The reversal of 172273922 is 229372271.

It can be written as a sum of positive squares in 2 ways, for example, as 139452481 + 32821441 = 11809^2 + 5729^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9281.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172273921) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13922 + ... + 23202.

Almost surely, 2^172273922 is an apocalyptic number.

172273922 is a deficient number, since it is larger than the sum of its proper divisors (86164807).

172273922 is an frugal number, since it uses more digits than its factorization.

172273922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18564 (or 9283 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 172273922 is about 13125.3160723847. The cubic root of 172273922 is about 556.4248452248.

The spelling of 172273922 in words is "one hundred seventy-two million, two hundred seventy-three thousand, nine hundred twenty-two".