220330321 has 4 divisors (see below), whose sum is σ = 220763700. Its totient is φ = 219896944.

The previous prime is 220330309. The next prime is 220330333. The reversal of 220330321 is 123033022.

220330321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (220330309) and next prime (220330333).

It can be written as a sum of positive squares in 2 ways, for example, as 198810000 + 21520321 = 14100^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 220330321 - 2⁷ = 220330193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220330295 and 220330304.

It is not an unprimeable number, because it can be changed into a prime (220330391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215926 + ... + 216943.

It is an arithmetic number, because the mean of its divisors is an integer number (55190925).

Almost surely, 2^220330321 is an apocalyptic number.

It is an amenable number.

220330321 is a deficient number, since it is larger than the sum of its proper divisors (433379).

220330321 is an equidigital number, since it uses as much as digits as its factorization.

220330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433378.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 220330321 is about 14843.5279162334. The cubic root of 220330321 is about 603.9830567371.

Adding to 220330321 its reverse (123033022), we get a palindrome (343363343).

The spelling of 220330321 in words is "two hundred twenty million, three hundred thirty thousand, three hundred twenty-one".