11131331 has 4 divisors (see below), whose sum is σ = 11515200. Its totient is φ = 10747464.

The previous prime is 11131327. The next prime is 11131349. The reversal of 11131331 is 13313111.

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 11131331 - 2² = 11131327 is a prime.

It is a super-2 number, since 2×11131331² = 247813059663122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131361) 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, 191891 + ... + 191948.

It is an arithmetic number, because the mean of its divisors is an integer number (2878800).

Almost surely, 2^11131331 is an apocalyptic number.

11131331 is a deficient number, since it is larger than the sum of its proper divisors (383869).

11131331 is an equidigital number, since it uses as much as digits as its factorization.

11131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383868.

The product of its digits is 27, while the sum is 14.

The square root of 11131331 is about 3336.3649380726. The cubic root of 11131331 is about 223.2795932676.

Adding to 11131331 its reverse (13313111), we get a palindrome (24444442).

The spelling of 11131331 in words is "eleven million, one hundred thirty-one thousand, three hundred thirty-one".