172105206 has 48 divisors (see below), whose sum is σ = 425988864. Its totient is φ = 45388512.

The previous prime is 172105187. The next prime is 172105243. The reversal of 172105206 is 602501271.

172105206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5026 + ... + 19221.

It is an arithmetic number, because the mean of its divisors is an integer number (8874768).

Almost surely, 2^172105206 is an apocalyptic number.

172105206 is an abundant number, since it is smaller than the sum of its proper divisors (253883658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172105206 is a wasteful number, since it uses less digits than its factorization.

172105206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24285 (or 24272 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 172105206 is about 13118.8873766032. The cubic root of 172105206 is about 556.2431415053.

Adding to 172105206 its reverse (602501271), we get a palindrome (774606477).

The spelling of 172105206 in words is "one hundred seventy-two million, one hundred five thousand, two hundred six".