321235231 has 2 divisors, whose sum is σ = 321235232. Its totient is φ = 321235230.

The previous prime is 321235217. The next prime is 321235303. The reversal of 321235231 is 132532123.

It is a weak prime.

It is an emirp because it is prime and its reverse (132532123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321235231 - 2⁵ = 321235199 is a prime.

It is a super-2 number, since 2×321235231² = 206384147271246722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321235631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160617615 + 160617616.

It is an arithmetic number, because the mean of its divisors is an integer number (160617616).

Almost surely, 2^321235231 is an apocalyptic number.

321235231 is a deficient number, since it is larger than the sum of its proper divisors (1).

321235231 is an equidigital number, since it uses as much as digits as its factorization.

321235231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 22.

The square root of 321235231 is about 17923.0363220075. The cubic root of 321235231 is about 684.8693383901.

Adding to 321235231 its reverse (132532123), we get a palindrome (453767354).

The spelling of 321235231 in words is "three hundred twenty-one million, two hundred thirty-five thousand, two hundred thirty-one".