171171228 has 48 divisors (see below), whose sum is σ = 430698240. Its totient is φ = 52732800.

The previous prime is 171171223. The next prime is 171171233. The reversal of 171171228 is 822171171.

It is an interprime number because it is at equal distance from previous prime (171171223) and next prime (171171233).

It is a junction number, because it is equal to n+sod(n) for n = 171171195 and 171171204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171171223) 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, 193 + ... + 18503.

It is an arithmetic number, because the mean of its divisors is an integer number (8972880).

Almost surely, 2^171171228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171171228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215349120).

171171228 is an abundant number, since it is smaller than the sum of its proper divisors (259527012).

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

171171228 is a wasteful number, since it uses less digits than its factorization.

171171228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18378 (or 18376 counting only the distinct ones).

The product of its digits is 1568, while the sum is 30.

The square root of 171171228 is about 13083.2422587064. The cubic root of 171171228 is about 555.2351118144.

The spelling of 171171228 in words is "one hundred seventy-one million, one hundred seventy-one thousand, two hundred twenty-eight".