172228165 has 8 divisors (see below), whose sum is σ = 206997120. Its totient is φ = 137566992.

The previous prime is 172228151. The next prime is 172228171. The reversal of 172228165 is 561822271.

It is a happy number.

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 172228165 - 2¹⁹ = 171703877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172228165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23385 + ... + 29854.

It is an arithmetic number, because the mean of its divisors is an integer number (25874640).

Almost surely, 2^172228165 is an apocalyptic number.

It is an amenable number.

172228165 is a deficient number, since it is larger than the sum of its proper divisors (34768955).

172228165 is an equidigital number, since it uses as much as digits as its factorization.

172228165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53891.

The product of its digits is 13440, while the sum is 34.

The square root of 172228165 is about 13123.5728747929. The cubic root of 172228165 is about 556.3755775898.

The spelling of 172228165 in words is "one hundred seventy-two million, two hundred twenty-eight thousand, one hundred sixty-five".