11031131 has 4 divisors (see below), whose sum is σ = 11144952. Its totient is φ = 10917312.

The previous prime is 11031121. The next prime is 11031161. The reversal of 11031131 is 13113011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11031131 - 2⁶ = 11031067 is a prime.

It is a super-2 number, since 2×11031131² = 243371702278322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11031121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56765 + ... + 56958.

It is an arithmetic number, because the mean of its divisors is an integer number (2786238).

Almost surely, 2^11031131 is an apocalyptic number.

11031131 is a deficient number, since it is larger than the sum of its proper divisors (113821).

11031131 is an equidigital number, since it uses as much as digits as its factorization.

11031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113820.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 11031131 is about 3321.3146493520. The cubic root of 11031131 is about 222.6076136423.

Adding to 11031131 its reverse (13113011), we get a palindrome (24144142).

The spelling of 11031131 in words is "eleven million, thirty-one thousand, one hundred thirty-one".