321322231 has 2 divisors, whose sum is σ = 321322232. Its totient is φ = 321322230.

The previous prime is 321322229. The next prime is 321322247. The reversal of 321322231 is 132223123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321322231 - 2¹ = 321322229 is a prime.

It is a super-2 number, since 2×321322231² = 206495952269634722, which contains 22 as substring.

Together with 321322229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 321322199 and 321322208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321322271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160661115 + 160661116.

It is an arithmetic number, because the mean of its divisors is an integer number (160661116).

Almost surely, 2^321322231 is an apocalyptic number.

321322231 is a deficient number, since it is larger than the sum of its proper divisors (1).

321322231 is an equidigital number, since it uses as much as digits as its factorization.

321322231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 321322231 is about 17925.4632018255. The cubic root of 321322231 is about 684.9311604326.

Adding to 321322231 its reverse (132223123), we get a palindrome (453545354).

The spelling of 321322231 in words is "three hundred twenty-one million, three hundred twenty-two thousand, two hundred thirty-one".