171225564 has 72 divisors (see below), whose sum is σ = 429628080. Its totient is φ = 53059584.

The previous prime is 171225533. The next prime is 171225577. The reversal of 171225564 is 465522171.

171225564 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, 336142 + ... + 336650.

Almost surely, 2^171225564 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 171225564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214814040).

171225564 is an abundant number, since it is smaller than the sum of its proper divisors (258402516).

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

171225564 is a wasteful number, since it uses less digits than its factorization.

171225564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 628 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 171225564 is about 13085.3186434263. The cubic root of 171225564 is about 555.2938562340.

The spelling of 171225564 in words is "one hundred seventy-one million, two hundred twenty-five thousand, five hundred sixty-four".