12217663 has 4 divisors (see below), whose sum is σ = 12239928. Its totient is φ = 12195400.

The previous prime is 12217657. The next prime is 12217693. The reversal of 12217663 is 36671221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12217663 - 2⁹ = 12217151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217693) 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, 10288 + ... + 11413.

It is an arithmetic number, because the mean of its divisors is an integer number (3059982).

Almost surely, 2^12217663 is an apocalyptic number.

12217663 is a deficient number, since it is larger than the sum of its proper divisors (22265).

12217663 is an equidigital number, since it uses as much as digits as its factorization.

12217663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22264.

The product of its digits is 3024, while the sum is 28.

The square root of 12217663 is about 3495.3773759066. The cubic root of 12217663 is about 230.3187954790.

Adding to 12217663 its reverse (36671221), we get a palindrome (48888884).

It can be divided in two parts, 12217 and 663, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 12217663 in words is "twelve million, two hundred seventeen thousand, six hundred sixty-three".