1431442321 has 2 divisors, whose sum is σ = 1431442322. Its totient is φ = 1431442320.

The previous prime is 1431442297. The next prime is 1431442361. The reversal of 1431442321 is 1232441341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1277061696 + 154380625 = 35736^2 + 12425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431442321 - 2⁷ = 1431442193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431442361) 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, 715721160 + 715721161.

It is an arithmetic number, because the mean of its divisors is an integer number (715721161).

Almost surely, 2^1431442321 is an apocalyptic number.

It is an amenable number.

1431442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431442321 is an equidigital number, since it uses as much as digits as its factorization.

1431442321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 1431442321 is about 37834.4065765541. The cubic root of 1431442321 is about 1127.0018208095.

Adding to 1431442321 its reverse (1232441341), we get a palindrome (2663883662).

The spelling of 1431442321 in words is "one billion, four hundred thirty-one million, four hundred forty-two thousand, three hundred twenty-one".