320211231 has 16 divisors (see below), whose sum is σ = 439084800. Its totient is φ = 207487808.

The previous prime is 320211223. The next prime is 320211233. The reversal of 320211231 is 132112023.

It is a cyclic number.

It is not a de Polignac number, because 320211231 - 2³ = 320211223 is a prime.

It is a super-2 number, since 2×320211231² = 205070464917070722, 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 320211231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320211233) 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 15 ways as a sum of consecutive naturals, for example, 5590 + ... + 25916.

It is an arithmetic number, because the mean of its divisors is an integer number (27442800).

Almost surely, 2^320211231 is an apocalyptic number.

320211231 is a deficient number, since it is larger than the sum of its proper divisors (118873569).

320211231 is a wasteful number, since it uses less digits than its factorization.

320211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 320211231 is about 17894.4469319395. The cubic root of 320211231 is about 684.1408455385.

Adding to 320211231 its reverse (132112023), we get a palindrome (452323254).

The spelling of 320211231 in words is "three hundred twenty million, two hundred eleven thousand, two hundred thirty-one".