12231136 has 24 divisors (see below), whose sum is σ = 25348680. Its totient is φ = 5793408.

The previous prime is 12231133. The next prime is 12231157. The reversal of 12231136 is 63113221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231133) 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, 9451 + ... + 10666.

It is an arithmetic number, because the mean of its divisors is an integer number (1056195).

Almost surely, 2^12231136 is an apocalyptic number.

12231136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12231136 is an abundant number, since it is smaller than the sum of its proper divisors (13117544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12231136 is a wasteful number, since it uses less digits than its factorization.

12231136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20146 (or 20138 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 12231136 is about 3497.3041045926. The cubic root of 12231136 is about 230.4034255535.

Adding to 12231136 its reverse (63113221), we get a palindrome (75344357).

The spelling of 12231136 in words is "twelve million, two hundred thirty-one thousand, one hundred thirty-six".