11431131 has 16 divisors (see below), whose sum is σ = 15552000. Its totient is φ = 7467488.

The previous prime is 11431129. The next prime is 11431139. The reversal of 11431131 is 13113411.

11431131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11431131 - 2¹ = 11431129 is a prime.

It is a super-2 number, since 2×11431131² = 261341511878322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11431131.

It is not an unprimeable number, because it can be changed into a prime (11431139) 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, 47710 + ... + 47948.

It is an arithmetic number, because the mean of its divisors is an integer number (972000).

Almost surely, 2^11431131 is an apocalyptic number.

11431131 is a deficient number, since it is larger than the sum of its proper divisors (4120869).

11431131 is a wasteful number, since it uses less digits than its factorization.

11431131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its digits is 36, while the sum is 15.

The square root of 11431131 is about 3380.9955634399. The cubic root of 11431131 is about 225.2663906529.

Adding to 11431131 its reverse (13113411), we get a palindrome (24544542).

The spelling of 11431131 in words is "eleven million, four hundred thirty-one thousand, one hundred thirty-one".