213323441 has 2 divisors, whose sum is σ = 213323442. Its totient is φ = 213323440.

The previous prime is 213323437. The next prime is 213323443. The reversal of 213323441 is 144323312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207936400 + 5387041 = 14420^2 + 2321^2 .

It is a cyclic number.

It is not a de Polignac number, because 213323441 - 2² = 213323437 is a prime.

Together with 213323443, 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 (213323443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106661720 + 106661721.

It is an arithmetic number, because the mean of its divisors is an integer number (106661721).

Almost surely, 2^213323441 is an apocalyptic number.

It is an amenable number.

213323441 is a deficient number, since it is larger than the sum of its proper divisors (1).

213323441 is an equidigital number, since it uses as much as digits as its factorization.

213323441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 213323441 is about 14605.5962219966. The cubic root of 213323441 is about 597.5113969920.

Adding to 213323441 its reverse (144323312), we get a palindrome (357646753).

The spelling of 213323441 in words is "two hundred thirteen million, three hundred twenty-three thousand, four hundred forty-one".