320200221 has 16 divisors (see below), whose sum is σ = 466076160. Its totient is φ = 193923120.

The previous prime is 320200187. The next prime is 320200247. The reversal of 320200221 is 122002023.

It is not a de Polignac number, because 320200221 - 2⁶ = 320200157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320200197 and 320200206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320200121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62856 + ... + 67758.

It is an arithmetic number, because the mean of its divisors is an integer number (29129760).

Almost surely, 2^320200221 is an apocalyptic number.

It is an amenable number.

320200221 is a deficient number, since it is larger than the sum of its proper divisors (145875939).

320200221 is a wasteful number, since it uses less digits than its factorization.

320200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 320200221 is about 17894.1392919581. The cubic root of 320200221 is about 684.1330043841.

Adding to 320200221 its reverse (122002023), we get a palindrome (442202244).

It can be divided in two parts, 3202002 and 21, that added together give a palindrome (3202023).

The spelling of 320200221 in words is "three hundred twenty million, two hundred thousand, two hundred twenty-one".