220064321 has 4 divisors (see below), whose sum is σ = 224216532. Its totient is φ = 215912112.

The previous prime is 220064309. The next prime is 220064323. The reversal of 220064321 is 123460022.

220064321 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 can be written as a sum of positive squares in 2 ways, for example, as 111091600 + 108972721 = 10540^2 + 10439^2 .

It is a cyclic number.

It is not a de Polignac number, because 220064321 - 2¹⁰ = 220063297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220064293 and 220064302.

It is not an unprimeable number, because it can be changed into a prime (220064323) 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, 2076026 + ... + 2076131.

It is an arithmetic number, because the mean of its divisors is an integer number (56054133).

Almost surely, 2^220064321 is an apocalyptic number.

It is an amenable number.

220064321 is a deficient number, since it is larger than the sum of its proper divisors (4152211).

220064321 is an equidigital number, since it uses as much as digits as its factorization.

220064321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152210.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 220064321 is about 14834.5650761996. The cubic root of 220064321 is about 603.7399003264.

The spelling of 220064321 in words is "two hundred twenty million, sixty-four thousand, three hundred twenty-one".