4431142231 has 2 divisors, whose sum is σ = 4431142232. Its totient is φ = 4431142230.

The previous prime is 4431142213. The next prime is 4431142241. The reversal of 4431142231 is 1322411344.

Together with previous prime (4431142213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4431142231 is a prime.

It is a super-2 number, since 2×4431142231² = 39270042942703314722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4431142196 and 4431142205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431142241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215571115 + 2215571116.

It is an arithmetic number, because the mean of its divisors is an integer number (2215571116).

Almost surely, 2^4431142231 is an apocalyptic number.

4431142231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431142231 is an equidigital number, since it uses as much as digits as its factorization.

4431142231 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 4431142231 is about 66566.8253036000. The cubic root of 4431142231 is about 1642.4994397143.

Adding to 4431142231 its reverse (1322411344), we get a palindrome (5753553575).

The spelling of 4431142231 in words is "four billion, four hundred thirty-one million, one hundred forty-two thousand, two hundred thirty-one".