13318213 has 2 divisors, whose sum is σ = 13318214. Its totient is φ = 13318212.

The previous prime is 13318199. The next prime is 13318223. The reversal of 13318213 is 31281331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8661249 + 4656964 = 2943^2 + 2158^2 .

It is an emirp because it is prime and its reverse (31281331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13318213 - 2²¹ = 11221061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13318223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6659106 + 6659107.

It is an arithmetic number, because the mean of its divisors is an integer number (6659107).

Almost surely, 2^13318213 is an apocalyptic number.

It is an amenable number.

13318213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13318213 is an equidigital number, since it uses as much as digits as its factorization.

13318213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 13318213 is about 3649.4126924753. The cubic root of 13318213 is about 237.0365507076.

Adding to 13318213 its reverse (31281331), we get a palindrome (44599544).

It can be divided in two parts, 13318 and 213, that added together give a palindrome (13531).

The spelling of 13318213 in words is "thirteen million, three hundred eighteen thousand, two hundred thirteen".