4431313231 has 2 divisors, whose sum is σ = 4431313232. Its totient is φ = 4431313230.

The previous prime is 4431313223. The next prime is 4431313253. The reversal of 4431313231 is 1323131344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4431313231 - 2³ = 4431313223 is a prime.

It is a super-2 number, since 2×4431313231² = 39273073902471318722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4431313196 and 4431313205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431313261) 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, 2215656615 + 2215656616.

It is an arithmetic number, because the mean of its divisors is an integer number (2215656616).

Almost surely, 2^4431313231 is an apocalyptic number.

4431313231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431313231 is an equidigital number, since it uses as much as digits as its factorization.

4431313231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 4431313231 is about 66568.1097147876. The cubic root of 4431313231 is about 1642.5205677348.

Adding to 4431313231 its reverse (1323131344), we get a palindrome (5754444575).

The spelling of 4431313231 in words is "four billion, four hundred thirty-one million, three hundred thirteen thousand, two hundred thirty-one".