172171223 has 16 divisors (see below), whose sum is σ = 208816704. Its totient is φ = 138577920.

The previous prime is 172171213. The next prime is 172171253. The reversal of 172171223 is 322171271.

It is a cyclic number.

It is not a de Polignac number, because 172171223 - 2⁶ = 172171159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172171192 and 172171201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60611 + ... + 63387.

It is an arithmetic number, because the mean of its divisors is an integer number (13051044).

Almost surely, 2^172171223 is an apocalyptic number.

172171223 is a deficient number, since it is larger than the sum of its proper divisors (36645481).

172171223 is a wasteful number, since it uses less digits than its factorization.

172171223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322.

The product of its digits is 1176, while the sum is 26.

The square root of 172171223 is about 13121.4032405075. The cubic root of 172171223 is about 556.3142546150.

The spelling of 172171223 in words is "one hundred seventy-two million, one hundred seventy-one thousand, two hundred twenty-three".