4431320431 has 2 divisors, whose sum is σ = 4431320432. Its totient is φ = 4431320430.

The previous prime is 4431320423. The next prime is 4431320441. The reversal of 4431320431 is 1340231344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4431320431 - 2³ = 4431320423 is a prime.

It is a super-2 number, since 2×4431320431² = 39273201524396051522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4431320396 and 4431320405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431320441) 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, 2215660215 + 2215660216.

It is an arithmetic number, because the mean of its divisors is an integer number (2215660216).

Almost surely, 2^4431320431 is an apocalyptic number.

4431320431 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431320431 is an equidigital number, since it uses as much as digits as its factorization.

4431320431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 4431320431 is about 66568.1637947150. The cubic root of 4431320431 is about 1642.5214573237.

Adding to 4431320431 its reverse (1340231344), we get a palindrome (5771551775).

The spelling of 4431320431 in words is "four billion, four hundred thirty-one million, three hundred twenty thousand, four hundred thirty-one".