12217313 has 2 divisors, whose sum is σ = 12217314. Its totient is φ = 12217312.

The previous prime is 12217277. The next prime is 12217327. The reversal of 12217313 is 31371221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 3265249 = 2992^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 12217313 - 2²⁰ = 11168737 is a prime.

It is not a weakly prime, because it can be changed into another prime (12217333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108656 + 6108657.

It is an arithmetic number, because the mean of its divisors is an integer number (6108657).

Almost surely, 2^12217313 is an apocalyptic number.

It is an amenable number.

12217313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12217313 is an equidigital number, since it uses as much as digits as its factorization.

12217313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 20.

The square root of 12217313 is about 3495.3273094233. The cubic root of 12217313 is about 230.3165961400.

Adding to 12217313 its reverse (31371221), we get a palindrome (43588534).

The spelling of 12217313 in words is "twelve million, two hundred seventeen thousand, three hundred thirteen".