1131431133 has 16 divisors (see below), whose sum is σ = 1814827520. Its totient is φ = 612503856.

The previous prime is 1131431131. The next prime is 1131431137. The reversal of 1131431133 is 3311341311.

It is not a de Polignac number, because 1131431133 - 2¹ = 1131431131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417435 + ... + 1418232.

It is an arithmetic number, because the mean of its divisors is an integer number (113426720).

Almost surely, 2^1131431133 is an apocalyptic number.

It is an amenable number.

1131431133 is a deficient number, since it is larger than the sum of its proper divisors (683396387).

1131431133 is a wasteful number, since it uses less digits than its factorization.

1131431133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835696.

The product of its digits is 324, while the sum is 21.

The square root of 1131431133 is about 33636.7527118775. The cubic root of 1131431133 is about 1042.0199686591.

Adding to 1131431133 its reverse (3311341311), we get a palindrome (4442772444).

The spelling of 1131431133 in words is "one billion, one hundred thirty-one million, four hundred thirty-one thousand, one hundred thirty-three".