4431421231 has 2 divisors, whose sum is σ = 4431421232. Its totient is φ = 4431421230.

The previous prime is 4431421223. The next prime is 4431421249. The reversal of 4431421231 is 1321241344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4431421231 - 2³ = 4431421223 is a prime.

It is a super-2 number, since 2×4431421231² = 39274988253115110722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4431421196 and 4431421205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431431231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215710615 + 2215710616.

It is an arithmetic number, because the mean of its divisors is an integer number (2215710616).

Almost surely, 2^4431421231 is an apocalyptic number.

4431421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431421231 is an equidigital number, since it uses as much as digits as its factorization.

4431421231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 4431421231 is about 66568.9209090849. The cubic root of 4431421231 is about 1642.5339114677.

Adding to 4431421231 its reverse (1321241344), we get a palindrome (5752662575).

The spelling of 4431421231 in words is "four billion, four hundred thirty-one million, four hundred twenty-one thousand, two hundred thirty-one".