1143330431 has 4 divisors (see below), whose sum is σ = 1147581000. Its totient is φ = 1139079864.

The previous prime is 1143330407. The next prime is 1143330439. The reversal of 1143330431 is 1340333411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340333411 = 12697 ⋅105563.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143330431 is a prime.

It is a super-2 number, since 2×1143330431² = 2614408948901291522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143330397 and 1143330406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143330439) 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 in 3 ways as a sum of consecutive naturals, for example, 2124881 + ... + 2125418.

It is an arithmetic number, because the mean of its divisors is an integer number (286895250).

Almost surely, 2^1143330431 is an apocalyptic number.

1143330431 is a deficient number, since it is larger than the sum of its proper divisors (4250569).

1143330431 is an equidigital number, since it uses as much as digits as its factorization.

1143330431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250568.

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

The square root of 1143330431 is about 33813.1694905994. The cubic root of 1143330431 is about 1045.6602227313.

Adding to 1143330431 its reverse (1340333411), we get a palindrome (2483663842).

The spelling of 1143330431 in words is "one billion, one hundred forty-three million, three hundred thirty thousand, four hundred thirty-one".