221160 has 64 divisors (see below), whose sum is σ = 705600. Its totient is φ = 55296.
The previous prime is 221159. The next prime is 221171. The reversal of 221160 is 61122.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2232 + ... + 2328.
It is an arithmetic number, because the mean of its divisors is an integer number (11025).
2221160 is an apocalyptic number.
221160 is a gapful number since it is divisible by the number (20) 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 221160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352800).
221160 is an abundant number, since it is smaller than the sum of its proper divisors (484440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221160 is a wasteful number, since it uses less digits than its factorization.
221160 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 130 (or 126 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 12.
The square root of 221160 is about 470.2765144040. The cubic root of 221160 is about 60.4740229529.
Adding to 221160 its reverse (61122), we get a palindrome (282282).
The spelling of 221160 in words is "two hundred twenty-one thousand, one hundred sixty".
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