12216824 has 16 divisors (see below), whose sum is σ = 22944120. Its totient is φ = 6098400.

The previous prime is 12216823. The next prime is 12216833. The reversal of 12216824 is 42861221.

It is a happy number.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12216793 and 12216802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216823) 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, 7682 + ... + 9134.

Almost surely, 2^12216824 is an apocalyptic number.

It is an amenable number.

12216824 is a deficient number, since it is larger than the sum of its proper divisors (10727296).

12216824 is a wasteful number, since it uses less digits than its factorization.

12216824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510 (or 2506 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 12216824 is about 3495.2573581927. The cubic root of 12216824 is about 230.3135232789.

The spelling of 12216824 in words is "twelve million, two hundred sixteen thousand, eight hundred twenty-four".