1131313443 has 64 divisors (see below), whose sum is σ = 1765048320. Its totient is φ = 638972928.

The previous prime is 1131313429. The next prime is 1131313459. The reversal of 1131313443 is 3443131311.

1131313443 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131313443 - 2¹⁶ = 1131247907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131313483) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2953630 + ... + 2954012.

It is an arithmetic number, because the mean of its divisors is an integer number (27578880).

Almost surely, 2^1131313443 is an apocalyptic number.

1131313443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131313443 is a deficient number, since it is larger than the sum of its proper divisors (633734877).

1131313443 is a wasteful number, since it uses less digits than its factorization.

1131313443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its digits is 1296, while the sum is 24.

The square root of 1131313443 is about 33635.0032406718. The cubic root of 1131313443 is about 1041.9838375508.

Adding to 1131313443 its reverse (3443131311), we get a palindrome (4574444754).

The spelling of 1131313443 in words is "one billion, one hundred thirty-one million, three hundred thirteen thousand, four hundred forty-three".