1431106321 has 2 divisors, whose sum is σ = 1431106322. Its totient is φ = 1431106320.

The previous prime is 1431106307. The next prime is 1431106357. The reversal of 1431106321 is 1236011341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1429974225 + 1132096 = 37815^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431106321 - 2¹³ = 1431098129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1431106292 and 1431106301.

It is not a weakly prime, because it can be changed into another prime (1431406321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715553160 + 715553161.

It is an arithmetic number, because the mean of its divisors is an integer number (715553161).

Almost surely, 2^1431106321 is an apocalyptic number.

It is an amenable number.

1431106321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431106321 is an equidigital number, since it uses as much as digits as its factorization.

1431106321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1431106321 is about 37829.9659132810. The cubic root of 1431106321 is about 1126.9136341746.

Adding to 1431106321 its reverse (1236011341), we get a palindrome (2667117662).

The spelling of 1431106321 in words is "one billion, four hundred thirty-one million, one hundred six thousand, three hundred twenty-one".