1143031131 has 24 divisors (see below), whose sum is σ = 1831677120. Its totient is φ = 681001200.

The previous prime is 1143031111. The next prime is 1143031147. The reversal of 1143031131 is 1311303411.

It is a de Polignac number, because none of the positive numbers 2^k-1143031131 is a prime.

It is a super-2 number, since 2×1143031131² = 2613040332870278322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143031111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92005 + ... + 103686.

It is an arithmetic number, because the mean of its divisors is an integer number (76319880).

Almost surely, 2^1143031131 is an apocalyptic number.

1143031131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1143031131 is a deficient number, since it is larger than the sum of its proper divisors (688645989).

1143031131 is a wasteful number, since it uses less digits than its factorization.

1143031131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195767 (or 195764 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1143031131 is about 33808.7434105440. The cubic root of 1143031131 is about 1045.5689707743.

Adding to 1143031131 its reverse (1311303411), we get a palindrome (2454334542).

The spelling of 1143031131 in words is "one billion, one hundred forty-three million, thirty-one thousand, one hundred thirty-one".