13224643 has 4 divisors (see below), whose sum is σ = 13346080. Its totient is φ = 13103208.

The previous prime is 13224641. The next prime is 13224647. The reversal of 13224643 is 34642231.

13224643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13224643 - 2¹ = 13224641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13224641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60555 + ... + 60772.

It is an arithmetic number, because the mean of its divisors is an integer number (3336520).

Almost surely, 2^13224643 is an apocalyptic number.

13224643 is a deficient number, since it is larger than the sum of its proper divisors (121437).

13224643 is a wasteful number, since it uses less digits than its factorization.

13224643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121436.

The product of its digits is 3456, while the sum is 25.

The square root of 13224643 is about 3636.5702248135. The cubic root of 13224643 is about 236.4801283090.

Adding to 13224643 its reverse (34642231), we get a palindrome (47866874).

The spelling of 13224643 in words is "thirteen million, two hundred twenty-four thousand, six hundred forty-three".