12231644 has 12 divisors (see below), whose sum is σ = 21768600. Its totient is φ = 6012048.

The previous prime is 12231643. The next prime is 12231647. The reversal of 12231644 is 44613221.

It is a super-2 number, since 2×12231644² = 299226229885472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25679 + ... + 26150.

It is an arithmetic number, because the mean of its divisors is an integer number (1814050).

Almost surely, 2^12231644 is an apocalyptic number.

It is an amenable number.

12231644 is a deficient number, since it is larger than the sum of its proper divisors (9536956).

12231644 is a wasteful number, since it uses less digits than its factorization.

12231644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51892 (or 51890 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 12231644 is about 3497.3767312087. The cubic root of 12231644 is about 230.4066153177.

Adding to 12231644 its reverse (44613221), we get a palindrome (56844865).

The spelling of 12231644 in words is "twelve million, two hundred thirty-one thousand, six hundred forty-four".