221024 has 12 divisors (see below), whose sum is σ = 435204.
Its totient is φ = 110496.
The previous prime is 221021. The next prime is 221047. The reversal of 221024 is 420122.
Adding to 221024 its reverse (420122), we get a palindrome (641146).
It is a junction number, because it is equal to n+sod(n) for n = 220996 and 221014.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221024.
It is not an unprimeable number, because it can be changed into a prime (221021) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422 + ... + 3485.
It is an arithmetic number, because the mean of its divisors is an integer number (36267).
2221024 is an apocalyptic number.
It is an amenable number.
221024 is a deficient number, since it is larger than the sum of its proper divisors (214180).
221024 is an equidigital number, since it uses as much as digits as its factorization.
221024 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6917 (or 6909 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 221024 is about 470.1318963865.
The cubic root of 221024 is about 60.4616244578.
The spelling of 221024 in words is "two hundred twenty-one thousand, twenty-four", and thus it is an iban number.