1131303143 has 4 divisors (see below), whose sum is σ = 1142966160. Its totient is φ = 1119640128.

The previous prime is 1131303109. The next prime is 1131303161. The reversal of 1131303143 is 3413031311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3413031311 = 1093 ⋅3122627.

It is a cyclic number.

It is not a de Polignac number, because 1131303143 - 2¹⁶ = 1131237607 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 (1131303343) 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, 5831363 + ... + 5831556.

It is an arithmetic number, because the mean of its divisors is an integer number (285741540).

Almost surely, 2^1131303143 is an apocalyptic number.

1131303143 is a deficient number, since it is larger than the sum of its proper divisors (11663017).

1131303143 is an equidigital number, since it uses as much as digits as its factorization.

1131303143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11663016.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1131303143 is about 33634.8501260226. The cubic root of 1131303143 is about 1041.9806753072.

Adding to 1131303143 its reverse (3413031311), we get a palindrome (4544334454).

The spelling of 1131303143 in words is "one billion, one hundred thirty-one million, three hundred three thousand, one hundred forty-three".