12217248 has 72 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 3997824.

The previous prime is 12217241. The next prime is 12217277. The reversal of 12217248 is 84271221.

12217248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×12217248² = 298522297387008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12217241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16633 + ... + 17351.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^12217248 is an apocalyptic number.

12217248 is a gapful number since it is divisible by the number (18) 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 12217248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17690400).

12217248 is an abundant number, since it is smaller than the sum of its proper divisors (23163552).

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

12217248 is a wasteful number, since it uses less digits than its factorization.

12217248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 783 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12217248 is about 3495.3180112831. The cubic root of 12217248 is about 230.3161876867.

Adding to 12217248 its reverse (84271221), we get a palindrome (96488469).

The spelling of 12217248 in words is "twelve million, two hundred seventeen thousand, two hundred forty-eight".