221324 has 6 divisors (see below), whose sum is σ = 387324. Its totient is φ = 110660.

The previous prime is 221317. The next prime is 221327. The reversal of 221324 is 423122.

221324 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 221299 and 221308.

It is not an unprimeable number, because it can be changed into a prime (221327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27662 + ... + 27669.

It is an arithmetic number, because the mean of its divisors is an integer number (64554).

2²²¹³²⁴ is an apocalyptic number.

It is an amenable number.

221324 is a deficient number, since it is larger than the sum of its proper divisors (166000).

221324 is a wasteful number, since it uses less digits than its factorization.

221324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55335 (or 55333 counting only the distinct ones).

The product of its digits is 96, while the sum is 14.

The square root of 221324 is about 470.4508475920. The cubic root of 221324 is about 60.4889673209.

Adding to 221324 its reverse (423122), we get a palindrome (644446).

It can be divided in two parts, 221 and 324, that added together give a palindrome (545).

The spelling of 221324 in words is "two hundred twenty-one thousand, three hundred twenty-four", and thus it is an iban number.