13213229 has 2 divisors, whose sum is σ = 13213230. Its totient is φ = 13213228.

The previous prime is 13213159. The next prime is 13213231. The reversal of 13213229 is 92231231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13213225 + 4 = 3635^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 13213229 - 2²⁰ = 12164653 is a prime.

It is a Sophie Germain prime.

Together with 13213231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13213259) 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, 6606614 + 6606615.

It is an arithmetic number, because the mean of its divisors is an integer number (6606615).

Almost surely, 2^13213229 is an apocalyptic number.

It is an amenable number.

13213229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13213229 is an equidigital number, since it uses as much as digits as its factorization.

13213229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 13213229 is about 3635.0005502063. Note that the first 3 decimals coincide. The cubic root of 13213229 is about 236.4120745224.

The spelling of 13213229 in words is "thirteen million, two hundred thirteen thousand, two hundred twenty-nine".