13243213 has 2 divisors, whose sum is σ = 13243214. Its totient is φ = 13243212.

The previous prime is 13243211. The next prime is 13243253. The reversal of 13243213 is 31234231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10099684 + 3143529 = 3178^2 + 1773^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243213 - 2¹ = 13243211 is a prime.

Together with 13243211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13243211) 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, 6621606 + 6621607.

It is an arithmetic number, because the mean of its divisors is an integer number (6621607).

Almost surely, 2^13243213 is an apocalyptic number.

It is an amenable number.

13243213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13243213 is an equidigital number, since it uses as much as digits as its factorization.

13243213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 13243213 is about 3639.1225590793. The cubic root of 13243213 is about 236.5907647450.

Adding to 13243213 its reverse (31234231), we get a palindrome (44477444).

It can be divided in two parts, 13243 and 213, that added together give a square (13456 = 116²).

The spelling of 13243213 in words is "thirteen million, two hundred forty-three thousand, two hundred thirteen".