320352221 has 8 divisors (see below), whose sum is σ = 366343104. Its totient is φ = 274417920.

The previous prime is 320352209. The next prime is 320352223. The reversal of 320352221 is 122253023.

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

It is not a de Polignac number, because 320352221 - 2¹⁴ = 320335837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320352193 and 320352202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320352223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220 + ... + 25341.

It is an arithmetic number, because the mean of its divisors is an integer number (45792888).

Almost surely, 2^320352221 is an apocalyptic number.

It is an amenable number.

320352221 is a deficient number, since it is larger than the sum of its proper divisors (45990883).

320352221 is a wasteful number, since it uses less digits than its factorization.

320352221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28291.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 320352221 is about 17898.3859886862. The cubic root of 320352221 is about 684.2412405852.

The spelling of 320352221 in words is "three hundred twenty million, three hundred fifty-two thousand, two hundred twenty-one".