11831131 has 8 divisors (see below), whose sum is σ = 13295520. Its totient is φ = 10445952.

The previous prime is 11831123. The next prime is 11831219. The reversal of 11831131 is 13113811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11831131 - 2³ = 11831123 is a prime.

It is a super-2 number, since 2×11831131² = 279951321478322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11831099 and 11831108.

It is not an unprimeable number, because it can be changed into a prime (11831111) 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 7 ways as a sum of consecutive naturals, for example, 19486 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (1661940).

Almost surely, 2^11831131 is an apocalyptic number.

11831131 is a deficient number, since it is larger than the sum of its proper divisors (1464389).

11831131 is a wasteful number, since it uses less digits than its factorization.

11831131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39605.

The product of its digits is 72, while the sum is 19.

The square root of 11831131 is about 3439.6411150002. The cubic root of 11831131 is about 227.8638447879.

Adding to 11831131 its reverse (13113811), we get a palindrome (24944942).

The spelling of 11831131 in words is "eleven million, eight hundred thirty-one thousand, one hundred thirty-one".