1131431132 has 12 divisors (see below), whose sum is σ = 2132312616. Its totient is φ = 522198960.

The previous prime is 1131431131. The next prime is 1131431137. The reversal of 1131431132 is 2311341311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131431131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10879094 + ... + 10879197.

It is an arithmetic number, because the mean of its divisors is an integer number (177692718).

Almost surely, 2^1131431132 is an apocalyptic number.

It is an amenable number.

1131431132 is a deficient number, since it is larger than the sum of its proper divisors (1000881484).

1131431132 is a wasteful number, since it uses less digits than its factorization.

1131431132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21758308 (or 21758306 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1131431132 is about 33636.7526970128. The cubic root of 1131431132 is about 1042.0199683521.

Adding to 1131431132 its reverse (2311341311), we get a palindrome (3442772443).

The spelling of 1131431132 in words is "one billion, one hundred thirty-one million, four hundred thirty-one thousand, one hundred thirty-two".