1431230321 has 2 divisors, whose sum is σ = 1431230322. Its totient is φ = 1431230320.

The previous prime is 1431230299. The next prime is 1431230341. The reversal of 1431230321 is 1230321341.

It is an a-pointer prime, because the next prime (1431230341) can be obtained adding 1431230321 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185838096 + 245392225 = 34436^2 + 15665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431230321 - 2⁶ = 1431230257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1431230293 and 1431230302.

It is not a weakly prime, because it can be changed into another prime (1431230341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715615160 + 715615161.

It is an arithmetic number, because the mean of its divisors is an integer number (715615161).

Almost surely, 2^1431230321 is an apocalyptic number.

It is an amenable number.

1431230321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431230321 is an equidigital number, since it uses as much as digits as its factorization.

1431230321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1431230321 is about 37831.6047901751. The cubic root of 1431230321 is about 1126.9461808491.

Adding to 1431230321 its reverse (1230321341), we get a palindrome (2661551662).

The spelling of 1431230321 in words is "one billion, four hundred thirty-one million, two hundred thirty thousand, three hundred twenty-one".