22443013 has 4 divisors (see below), whose sum is σ = 23216940. Its totient is φ = 21669088.

The previous prime is 22443011. The next prime is 22443023. The reversal of 22443013 is 31034422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31034422 = 2 ⋅15517211.

It can be written as a sum of positive squares in 2 ways, for example, as 12061729 + 10381284 = 3473^2 + 3222^2 .

It is a cyclic number.

It is not a de Polignac number, because 22443013 - 2¹ = 22443011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22443011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386920 + ... + 386977.

It is an arithmetic number, because the mean of its divisors is an integer number (5804235).

Almost surely, 2^22443013 is an apocalyptic number.

It is an amenable number.

22443013 is a deficient number, since it is larger than the sum of its proper divisors (773927).

22443013 is an equidigital number, since it uses as much as digits as its factorization.

22443013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773926.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22443013 is about 4737.4057246556. The cubic root of 22443013 is about 282.0722657375.

Adding to 22443013 its reverse (31034422), we get a palindrome (53477435).

The spelling of 22443013 in words is "twenty-two million, four hundred forty-three thousand, thirteen".