11143231 has 8 divisors (see below), whose sum is σ = 12323664. Its totient is φ = 9990720.

The previous prime is 11143219. The next prime is 11143243. The reversal of 11143231 is 13234111.

It is an interprime number because it is at equal distance from previous prime (11143219) and next prime (11143243).

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 11143231 - 2⁵ = 11143199 is a prime.

It is a super-2 number, since 2×11143231² = 248343194238722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143631) 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 7 ways as a sum of consecutive naturals, for example, 6136 + ... + 7741.

It is an arithmetic number, because the mean of its divisors is an integer number (1540458).

Almost surely, 2^11143231 is an apocalyptic number.

11143231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11143231 is a deficient number, since it is larger than the sum of its proper divisors (1180433).

11143231 is a wasteful number, since it uses less digits than its factorization.

11143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13961.

The product of its digits is 72, while the sum is 16.

The square root of 11143231 is about 3338.1478397459. The cubic root of 11143231 is about 223.3591309523.

Adding to 11143231 its reverse (13234111), we get a palindrome (24377342).

The spelling of 11143231 in words is "eleven million, one hundred forty-three thousand, two hundred thirty-one".