13311217 has 2 divisors, whose sum is σ = 13311218. Its totient is φ = 13311216.

The previous prime is 13311169. The next prime is 13311223. The reversal of 13311217 is 71211331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 1263376 = 3471^2 + 1124^2 .

It is an emirp because it is prime and its reverse (71211331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13311217 - 2¹¹ = 13309169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13311194 and 13311203.

It is not a weakly prime, because it can be changed into another prime (13311317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6655608 + 6655609.

It is an arithmetic number, because the mean of its divisors is an integer number (6655609).

Almost surely, 2^13311217 is an apocalyptic number.

It is an amenable number.

13311217 is a deficient number, since it is larger than the sum of its proper divisors (1).

13311217 is an equidigital number, since it uses as much as digits as its factorization.

13311217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 19.

The square root of 13311217 is about 3648.4540561723. The cubic root of 13311217 is about 236.9950386779.

Adding to 13311217 its reverse (71211331), we get a palindrome (84522548).

The spelling of 13311217 in words is "thirteen million, three hundred eleven thousand, two hundred seventeen".