4431155231 has 2 divisors, whose sum is σ = 4431155232. Its totient is φ = 4431155230.

The previous prime is 4431155207. The next prime is 4431155233. The reversal of 4431155231 is 1325511344.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4431155231 - 2³⁰ = 3357413407 is a prime.

It is a super-2 number, since 2×4431155231² = 39270273362437326722, which contains 22 as substring.

Together with 4431155233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4431155194 and 4431155203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431155233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215577615 + 2215577616.

It is an arithmetic number, because the mean of its divisors is an integer number (2215577616).

Almost surely, 2^4431155231 is an apocalyptic number.

4431155231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431155231 is an equidigital number, since it uses as much as digits as its factorization.

4431155231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 4431155231 is about 66566.9229497654. The cubic root of 4431155231 is about 1642.5010459572.

Adding to 4431155231 its reverse (1325511344), we get a palindrome (5756666575).

The spelling of 4431155231 in words is "four billion, four hundred thirty-one million, one hundred fifty-five thousand, two hundred thirty-one".