1143811283 has 4 divisors (see below), whose sum is σ = 1145511528. Its totient is φ = 1142111040.

The previous prime is 1143811211. The next prime is 1143811313. The reversal of 1143811283 is 3821183411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1143811283 - 2⁸ = 1143811027 is a prime.

It is a super-2 number, since 2×1143811283² = 2616608502236212178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143814283) 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, 849113 + ... + 850458.

It is an arithmetic number, because the mean of its divisors is an integer number (286377882).

Almost surely, 2^1143811283 is an apocalyptic number.

1143811283 is a deficient number, since it is larger than the sum of its proper divisors (1700245).

1143811283 is an equidigital number, since it uses as much as digits as its factorization.

1143811283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700244.

The product of its digits is 4608, while the sum is 32.

The square root of 1143811283 is about 33820.2791679785. The cubic root of 1143811283 is about 1045.8067937555.

Adding to 1143811283 its reverse (3821183411), we get a palindrome (4964994694).

The spelling of 1143811283 in words is "one billion, one hundred forty-three million, eight hundred eleven thousand, two hundred eighty-three".