171172422 has 48 divisors (see below), whose sum is σ = 401852880. Its totient is φ = 52448256.

The previous prime is 171172403. The next prime is 171172423. The reversal of 171172422 is 224271171.

It is a happy number.

171172422 is a `hidden beast` number, since 1 + 71 + 172 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171172423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6654 + ... + 19662.

It is an arithmetic number, because the mean of its divisors is an integer number (8371935).

Almost surely, 2^171172422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171172422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200926440).

171172422 is an abundant number, since it is smaller than the sum of its proper divisors (230680458).

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

171172422 is a wasteful number, since it uses less digits than its factorization.

171172422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13077 (or 13074 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 171172422 is about 13083.2878895177. The cubic root of 171172422 is about 555.2364028202.

The spelling of 171172422 in words is "one hundred seventy-one million, one hundred seventy-two thousand, four hundred twenty-two".