12231000 has 160 divisors (see below), whose sum is σ = 43037280. Its totient is φ = 3240000.

The previous prime is 12230993. The next prime is 12231001. The reversal of 12231000 is 13221.

It is a happy number.

It is a super-2 number, since 2×12231000² = 299194722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231001) 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 39 ways as a sum of consecutive naturals, for example, 80925 + ... + 81075.

It is an arithmetic number, because the mean of its divisors is an integer number (268983).

Almost surely, 2^12231000 is an apocalyptic number.

12231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21518640).

12231000 is an abundant number, since it is smaller than the sum of its proper divisors (30806280).

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

12231000 is a wasteful number, since it uses less digits than its factorization.

12231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12231000 is about 3497.2846609906. The cubic root of 12231000 is about 230.4025715859.

Adding to 12231000 its reverse (13221), we get a palindrome (12244221).

The spelling of 12231000 in words is "twelve million, two hundred thirty-one thousand".