213304361 has 2 divisors, whose sum is σ = 213304362. Its totient is φ = 213304360.

The previous prime is 213304307. The next prime is 213304363. The reversal of 213304361 is 163403312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183765136 + 29539225 = 13556^2 + 5435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213304361 is a prime.

Together with 213304363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213304363) 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, 106652180 + 106652181.

It is an arithmetic number, because the mean of its divisors is an integer number (106652181).

Almost surely, 2^213304361 is an apocalyptic number.

It is an amenable number.

213304361 is a deficient number, since it is larger than the sum of its proper divisors (1).

213304361 is an equidigital number, since it uses as much as digits as its factorization.

213304361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 213304361 is about 14604.9430330967. The cubic root of 213304361 is about 597.4935823263.

Adding to 213304361 its reverse (163403312), we get a palindrome (376707673).

The spelling of 213304361 in words is "two hundred thirteen million, three hundred four thousand, three hundred sixty-one".