11631143 has 4 divisors (see below), whose sum is σ = 11761920. Its totient is φ = 11500368.

The previous prime is 11631101. The next prime is 11631157. The reversal of 11631143 is 34113611.

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 11631143 - 2⁶ = 11631079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631443) 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, 65255 + ... + 65432.

It is an arithmetic number, because the mean of its divisors is an integer number (2940480).

Almost surely, 2^11631143 is an apocalyptic number.

11631143 is a deficient number, since it is larger than the sum of its proper divisors (130777).

11631143 is an equidigital number, since it uses as much as digits as its factorization.

11631143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130776.

The product of its digits is 216, while the sum is 20.

The square root of 11631143 is about 3410.4461584960. The cubic root of 11631143 is about 226.5726400186.

Adding to 11631143 its reverse (34113611), we get a palindrome (45744754).

The spelling of 11631143 in words is "eleven million, six hundred thirty-one thousand, one hundred forty-three".