221092 has 12 divisors (see below), whose sum is σ = 399616. Its totient is φ = 106920.
The previous prime is 221087. The next prime is 221093. The reversal of 221092 is 290122.
It is a happy number.
221092 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is not an unprimeable number, because it can be changed into a prime (221093) by changing a digit.
221092 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768 + ... + 1015.
2221092 is an apocalyptic number.
It is an amenable number.
221092 is a deficient number, since it is larger than the sum of its proper divisors (178524).
221092 is a wasteful number, since it uses less digits than its factorization.
221092 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1818 (or 1816 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 16.
The square root of 221092 is about 470.2042109552. The cubic root of 221092 is about 60.4678243409.
The spelling of 221092 in words is "two hundred twenty-one thousand, ninety-two".
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