320221 has 8 divisors (see below), whose sum is σ = 357984. Its totient is φ = 283920.

The previous prime is 320219. The next prime is 320237. The reversal of 320221 is 122023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320221 - 2¹ = 320219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320198 and 320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320291) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 135 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (44748).

2³²⁰²²¹ is an apocalyptic number.

It is an amenable number.

320221 is a deficient number, since it is larger than the sum of its proper divisors (37763).

320221 is a wasteful number, since it uses less digits than its factorization.

320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 320221 is about 565.8807294828. The cubic root of 320221 is about 68.4147802721.

Adding to 320221 its reverse (122023), we get a palindrome (442244).

It can be divided in two parts, 32022 and 1, that added together give a palindrome (32023).

The spelling of 320221 in words is "three hundred twenty thousand, two hundred twenty-one", and thus it is an iban number.