1143431513 has 24 divisors (see below), whose sum is σ = 1347480000. Its totient is φ = 967383648.

The previous prime is 1143431507. The next prime is 1143431521. The reversal of 1143431513 is 3151343411.

It is not a de Polignac number, because 1143431513 - 2⁶ = 1143431449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143431503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1452506 + ... + 1453292.

It is an arithmetic number, because the mean of its divisors is an integer number (56145000).

Almost surely, 2^1143431513 is an apocalyptic number.

It is an amenable number.

1143431513 is a deficient number, since it is larger than the sum of its proper divisors (204048487).

1143431513 is a wasteful number, since it uses less digits than its factorization.

1143431513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1142 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1143431513 is about 33814.6641710368. The cubic root of 1143431513 is about 1045.6910374777.

Adding to 1143431513 its reverse (3151343411), we get a palindrome (4294774924).

The spelling of 1143431513 in words is "one billion, one hundred forty-three million, four hundred thirty-one thousand, five hundred thirteen".