13212243 has 24 divisors (see below), whose sum is σ = 20934576. Its totient is φ = 7963200.

The previous prime is 13212229. The next prime is 13212259. The reversal of 13212243 is 34221231.

13212243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-13212243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31173 + ... + 31593.

It is an arithmetic number, because the mean of its divisors is an integer number (872274).

Almost surely, 2^13212243 is an apocalyptic number.

13212243 is a deficient number, since it is larger than the sum of its proper divisors (7722333).

13212243 is a wasteful number, since it uses less digits than its factorization.

13212243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 752 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 13212243 is about 3634.8649218368. The cubic root of 13212243 is about 236.4061938477.

Adding to 13212243 its reverse (34221231), we get a palindrome (47433474).

The spelling of 13212243 in words is "thirteen million, two hundred twelve thousand, two hundred forty-three".