12217568 has 48 divisors (see below), whose sum is σ = 26717040. Its totient is φ = 5452800.

The previous prime is 12217567. The next prime is 12217573. The reversal of 12217568 is 86571221.

12217568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21188 + ... + 21756.

It is an arithmetic number, because the mean of its divisors is an integer number (556605).

Almost surely, 2^12217568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12217568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13358520).

12217568 is an abundant number, since it is smaller than the sum of its proper divisors (14499472).

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

12217568 is a wasteful number, since it uses less digits than its factorization.

12217568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 643 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 12217568 is about 3495.3637865035. The cubic root of 12217568 is about 230.3181985197.

Adding to 12217568 its reverse (86571221), we get a palindrome (98788789).

It can be divided in two parts, 122 and 17568, that multiplied together give a square (2143296 = 1464²).

The spelling of 12217568 in words is "twelve million, two hundred seventeen thousand, five hundred sixty-eight".