320240221 has 8 divisors (see below), whose sum is σ = 374500544. Its totient is φ = 268107840.

The previous prime is 320240189. The next prime is 320240227. The reversal of 320240221 is 122042023.

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

It is not a de Polignac number, because 320240221 - 2⁵ = 320240189 is a prime.

It is a super-2 number, since 2×320240221² = 205107598292257682, 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 = 320240195 and 320240204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320240227) 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, 531660 + ... + 532261.

It is an arithmetic number, because the mean of its divisors is an integer number (46812568).

Almost surely, 2^320240221 is an apocalyptic number.

It is an amenable number.

320240221 is a deficient number, since it is larger than the sum of its proper divisors (54260323).

320240221 is a wasteful number, since it uses less digits than its factorization.

320240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063971.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 320240221 is about 17895.2569414356. The cubic root of 320240221 is about 684.1614909153.

Adding to 320240221 its reverse (122042023), we get a palindrome (442282244).

The spelling of 320240221 in words is "three hundred twenty million, two hundred forty thousand, two hundred twenty-one".