1143143311 has 4 divisors (see below), whose sum is σ = 1147361824. Its totient is φ = 1138924800.

The previous prime is 1143143203. The next prime is 1143143333. The reversal of 1143143311 is 1133413411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1133413411 = 13 ⋅87185647.

It is a cyclic number.

It is not a de Polignac number, because 1143143311 - 2⁹ = 1143142799 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 (1143146311) 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, 2108850 + ... + 2109391.

It is an arithmetic number, because the mean of its divisors is an integer number (286840456).

Almost surely, 2^1143143311 is an apocalyptic number.

1143143311 is a deficient number, since it is larger than the sum of its proper divisors (4218513).

1143143311 is an equidigital number, since it uses as much as digits as its factorization.

1143143311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218512.

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

The square root of 1143143311 is about 33810.4024081347. The cubic root of 1143143311 is about 1045.6031745934.

Adding to 1143143311 its reverse (1133413411), we get a palindrome (2276556722).

The spelling of 1143143311 in words is "one billion, one hundred forty-three million, one hundred forty-three thousand, three hundred eleven".