171164220 has 48 divisors (see below), whose sum is σ = 492219168. Its totient is φ = 44409600.

The previous prime is 171164219. The next prime is 171164233. The reversal of 171164220 is 22461171.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 36331 + ... + 40770.

It is an arithmetic number, because the mean of its divisors is an integer number (10254566).

Almost surely, 2^171164220 is an apocalyptic number.

171164220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171164220 is an abundant number, since it is smaller than the sum of its proper divisors (321054948).

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

171164220 is a wasteful number, since it uses less digits than its factorization.

171164220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77150 (or 77148 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 171164220 is about 13082.9744324446. The cubic root of 171164220 is about 555.2275343322.

The spelling of 171164220 in words is "one hundred seventy-one million, one hundred sixty-four thousand, two hundred twenty".