320421231 has 32 divisors (see below), whose sum is σ = 522117120. Its totient is φ = 192976992.

The previous prime is 320421229. The next prime is 320421259. The reversal of 320421231 is 132124023.

It is not a de Polignac number, because 320421231 - 2¹ = 320421229 is a prime.

It is a super-2 number, since 2×320421231² = 205339530551110722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320421931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6786 + ... + 26208.

It is an arithmetic number, because the mean of its divisors is an integer number (16316160).

Almost surely, 2^320421231 is an apocalyptic number.

320421231 is a deficient number, since it is larger than the sum of its proper divisors (201695889).

320421231 is a wasteful number, since it uses less digits than its factorization.

320421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19492 (or 19486 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320421231 is about 17900.3137123348. The cubic root of 320421231 is about 684.2903699441.

Adding to 320421231 its reverse (132124023), we get a palindrome (452545254).

The spelling of 320421231 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred thirty-one".