43220323221 has 16 divisors (see below), whose sum is σ = 58375660800. Its totient is φ = 28439506368.

The previous prime is 43220323219. The next prime is 43220323291. The reversal of 43220323221 is 12232302234.

It is not a de Polignac number, because 43220323221 - 2¹ = 43220323219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43220323191 and 43220323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43220323291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737035 + ... + 793511.

It is an arithmetic number, because the mean of its divisors is an integer number (3648478800).

Almost surely, 2^43220323221 is an apocalyptic number.

It is an amenable number.

43220323221 is a deficient number, since it is larger than the sum of its proper divisors (15155337579).

43220323221 is a wasteful number, since it uses less digits than its factorization.

43220323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59788.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 43220323221 its reverse (12232302234), we get a palindrome (55452625455).

The spelling of 43220323221 in words is "forty-three billion, two hundred twenty million, three hundred twenty-three thousand, two hundred twenty-one".