320220231 has 4 divisors (see below), whose sum is σ = 426960312. Its totient is φ = 213480152.

The previous prime is 320220203. The next prime is 320220239. The reversal of 320220231 is 132022023.

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

It is a cyclic number.

It is not a de Polignac number, because 320220231 - 2¹⁸ = 319958087 is a prime.

It is a super-2 number, since 2×320220231² = 205081992683386722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320220231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320220239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53370036 + ... + 53370041.

It is an arithmetic number, because the mean of its divisors is an integer number (106740078).

Almost surely, 2^320220231 is an apocalyptic number.

320220231 is a deficient number, since it is larger than the sum of its proper divisors (106740081).

320220231 is a wasteful number, since it uses less digits than its factorization.

320220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106740080.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320220231 is about 17894.6984048349. The cubic root of 320220231 is about 684.1472550679.

Adding to 320220231 its reverse (132022023), we get a palindrome (452242254).

The spelling of 320220231 in words is "three hundred twenty million, two hundred twenty thousand, two hundred thirty-one".