172222845 has 8 divisors (see below), whose sum is σ = 275556576. Its totient is φ = 91852176.

The previous prime is 172222819. The next prime is 172222849. The reversal of 172222845 is 548222271.

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

It is not a de Polignac number, because 172222845 - 2⁷ = 172222717 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172222849) 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, 5740747 + ... + 5740776.

It is an arithmetic number, because the mean of its divisors is an integer number (34444572).

Almost surely, 2^172222845 is an apocalyptic number.

172222845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172222845 is a deficient number, since it is larger than the sum of its proper divisors (103333731).

172222845 is a wasteful number, since it uses less digits than its factorization.

172222845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11481531.

The product of its digits is 17920, while the sum is 33.

The square root of 172222845 is about 13123.3701845220. The cubic root of 172222845 is about 556.3698488548.

The spelling of 172222845 in words is "one hundred seventy-two million, two hundred twenty-two thousand, eight hundred forty-five".