221671160 has 32 divisors (see below), whose sum is σ = 528100560. Its totient is φ = 83452416.

The previous prime is 221671147. The next prime is 221671169. The reversal of 221671160 is 61176122.

221671160 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221671169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162314 + ... + 163673.

Almost surely, 2^221671160 is an apocalyptic number.

221671160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221671160 is an abundant number, since it is smaller than the sum of its proper divisors (306429400).

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

221671160 is a wasteful number, since it uses less digits than its factorization.

221671160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326015 (or 326011 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 221671160 is about 14888.6251883779. The cubic root of 221671160 is about 605.2057765971.

The spelling of 221671160 in words is "two hundred twenty-one million, six hundred seventy-one thousand, one hundred sixty".