13220243 has 2 divisors, whose sum is σ = 13220244.
Its totient is φ = 13220242.
The previous prime is 13220231. The next prime is 13220261. The reversal of 13220243 is 34202231.
Adding to 13220243 its reverse (34202231), we get a palindrome (47422474).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 13220243 - 214 = 13203859 is a prime.
It is not a weakly prime, because it can be changed into another prime (13220213) 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, 6610121 + 6610122.
It is an arithmetic number, because the mean of its divisors is an integer number (6610122).
Almost surely, 213220243 is an apocalyptic number.
13220243 is a deficient number, since it is larger than the sum of its proper divisors (1).
13220243 is an equidigital number, since it uses as much as digits as its factorization.
13220243 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 288, while the sum is 17.
The square root of 13220243 is about 3635.9652088545.
The cubic root of 13220243 is about 236.4538987923.
The spelling of 13220243 in words is "thirteen million, two hundred twenty thousand, two hundred forty-three".