223444421213 has 4 divisors (see below), whose sum is σ = 240632453628. Its totient is φ = 206256388800.

The previous prime is 223444421203. The next prime is 223444421257. The reversal of 223444421213 is 312124444322.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117219271129 + 106225150084 = 342373^2 + 325922^2 .

It is a cyclic number.

It is not a de Polignac number, because 223444421213 - 2¹² = 223444417117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223444421213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223444421203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8594016188 + ... + 8594016213.

It is an arithmetic number, because the mean of its divisors is an integer number (60158113407).

Almost surely, 2^223444421213 is an apocalyptic number.

It is an amenable number.

223444421213 is a deficient number, since it is larger than the sum of its proper divisors (17188032415).

223444421213 is a wasteful number, since it uses less digits than its factorization.

223444421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17188032414.

The product of its digits is 36864, while the sum is 32.

Adding to 223444421213 its reverse (312124444322), we get a palindrome (535568865535).

The spelling of 223444421213 in words is "two hundred twenty-three billion, four hundred forty-four million, four hundred twenty-one thousand, two hundred thirteen".