1143311431 has 2 divisors, whose sum is σ = 1143311432. Its totient is φ = 1143311430.

The previous prime is 1143311423. The next prime is 1143311437. The reversal of 1143311431 is 1341133411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143311431 - 2³ = 1143311423 is a prime.

It is a super-2 number, since 2×1143311431² = 2614322056510535522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143311437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571655715 + 571655716.

It is an arithmetic number, because the mean of its divisors is an integer number (571655716).

Almost surely, 2^1143311431 is an apocalyptic number.

1143311431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143311431 is an equidigital number, since it uses as much as digits as its factorization.

1143311431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 1143311431 is about 33812.8885338121. Note that the first 3 decimals coincide. The cubic root of 1143311431 is about 1045.6544303975.

Adding to 1143311431 its reverse (1341133411), we get a palindrome (2484444842).

The spelling of 1143311431 in words is "one billion, one hundred forty-three million, three hundred eleven thousand, four hundred thirty-one".