320930221 has 8 divisors (see below), whose sum is σ = 322971264. Its totient is φ = 318895920.

The previous prime is 320930213. The next prime is 320930231. The reversal of 320930221 is 122039023.

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 320930221 - 2³ = 320930213 is a prime.

It is a super-2 number, since 2×320930221² = 205992413502217682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320930192 and 320930201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320930231) 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, 119920 + ... + 122566.

It is an arithmetic number, because the mean of its divisors is an integer number (40371408).

Almost surely, 2^320930221 is an apocalyptic number.

It is an amenable number.

320930221 is a deficient number, since it is larger than the sum of its proper divisors (2041043).

320930221 is a wasteful number, since it uses less digits than its factorization.

320930221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 320930221 is about 17914.5254193350. The cubic root of 320930221 is about 684.6525106314.

Adding to 320930221 its reverse (122039023), we get a palindrome (442969244).

The spelling of 320930221 in words is "three hundred twenty million, nine hundred thirty thousand, two hundred twenty-one".