171056220 has 96 divisors (see below), whose sum is σ = 490613760. Its totient is φ = 44520960.

The previous prime is 171056203. The next prime is 171056231. The reversal of 171056220 is 22650171.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549865 + ... + 550175.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560).

Almost surely, 2^171056220 is an apocalyptic number.

171056220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171056220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245306880).

171056220 is an abundant number, since it is smaller than the sum of its proper divisors (319557540).

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

171056220 is a wasteful number, since it uses less digits than its factorization.

171056220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 513 counting only the distinct ones).

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

The square root of 171056220 is about 13078.8462793933. The cubic root of 171056220 is about 555.1107319029.

The spelling of 171056220 in words is "one hundred seventy-one million, fifty-six thousand, two hundred twenty".