1143432011 has 4 divisors (see below), whose sum is σ = 1143519000. Its totient is φ = 1143345024.

The previous prime is 1143431953. The next prime is 1143432047. The reversal of 1143432011 is 1102343411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1143432011 - 2¹⁴ = 1143415627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143432071) 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, 19286 + ... + 51563.

It is an arithmetic number, because the mean of its divisors is an integer number (285879750).

Almost surely, 2^1143432011 is an apocalyptic number.

1143432011 is a deficient number, since it is larger than the sum of its proper divisors (86989).

1143432011 is an equidigital number, since it uses as much as digits as its factorization.

1143432011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86988.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1143432011 is about 33814.6715347052. The cubic root of 1143432011 is about 1045.6911892880.

Adding to 1143432011 its reverse (1102343411), we get a palindrome (2245775422).

The spelling of 1143432011 in words is "one billion, one hundred forty-three million, four hundred thirty-two thousand, eleven".