1431323321 has 2 divisors, whose sum is σ = 1431323322. Its totient is φ = 1431323320.

The previous prime is 1431323317. The next prime is 1431323339. The reversal of 1431323321 is 1233231341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322413225 + 108910096 = 36365^2 + 10436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431323321 - 2² = 1431323317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431353321) 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, 715661660 + 715661661.

It is an arithmetic number, because the mean of its divisors is an integer number (715661661).

Almost surely, 2^1431323321 is an apocalyptic number.

It is an amenable number.

1431323321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431323321 is an equidigital number, since it uses as much as digits as its factorization.

1431323321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 1431323321 is about 37832.8339012557. The cubic root of 1431323321 is about 1126.9705896214.

Adding to 1431323321 its reverse (1233231341), we get a palindrome (2664554662).

The spelling of 1431323321 in words is "one billion, four hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty-one".