1143431303 has 4 divisors (see below), whose sum is σ = 1306778640. Its totient is φ = 980083968.

The previous prime is 1143431299. The next prime is 1143431321. The reversal of 1143431303 is 3031343411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3031343411 = 97 ⋅31250963.

It is a cyclic number.

It is not a de Polignac number, because 1143431303 - 2² = 1143431299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143431353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81673658 + ... + 81673671.

It is an arithmetic number, because the mean of its divisors is an integer number (326694660).

Almost surely, 2^1143431303 is an apocalyptic number.

1143431303 is a deficient number, since it is larger than the sum of its proper divisors (163347337).

1143431303 is an equidigital number, since it uses as much as digits as its factorization.

1143431303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163347336.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1143431303 is about 33814.6610658750. The cubic root of 1143431303 is about 1045.6909734613.

Adding to 1143431303 its reverse (3031343411), we get a palindrome (4174774714).

The spelling of 1143431303 in words is "one billion, one hundred forty-three million, four hundred thirty-one thousand, three hundred three".