320500231 has 2 divisors, whose sum is σ = 320500232. Its totient is φ = 320500230.

The previous prime is 320500181. The next prime is 320500247. The reversal of 320500231 is 132005023.

It is an a-pointer prime, because the next prime (320500247) can be obtained adding 320500231 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320500231 - 2¹¹ = 320498183 is a prime.

It is a super-2 number, since 2×320500231² = 205440796142106722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320500261) 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 as a sum of consecutive naturals, namely, 160250115 + 160250116.

It is an arithmetic number, because the mean of its divisors is an integer number (160250116).

Almost surely, 2^320500231 is an apocalyptic number.

320500231 is a deficient number, since it is larger than the sum of its proper divisors (1).

320500231 is an equidigital number, since it uses as much as digits as its factorization.

320500231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 320500231 is about 17902.5202415749. The cubic root of 320500231 is about 684.3466026901.

Adding to 320500231 its reverse (132005023), we get a palindrome (452505254).

The spelling of 320500231 in words is "three hundred twenty million, five hundred thousand, two hundred thirty-one".