43220221013 has 4 divisors (see below), whose sum is σ = 43228980300. Its totient is φ = 43211461728.

The previous prime is 43220221003. The next prime is 43220221019. The reversal of 43220221013 is 31012202234.

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 17051658724 + 26168562289 = 130582^2 + 161767^2 .

It is a cyclic number.

It is not a de Polignac number, because 43220221013 - 2¹⁶ = 43220155477 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 (43220221019) 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, 4372238 + ... + 4382111.

It is an arithmetic number, because the mean of its divisors is an integer number (10807245075).

Almost surely, 2^43220221013 is an apocalyptic number.

It is an amenable number.

43220221013 is a deficient number, since it is larger than the sum of its proper divisors (8759287).

43220221013 is an equidigital number, since it uses as much as digits as its factorization.

43220221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759286.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 43220221013 its reverse (31012202234), we get a palindrome (74232423247).

The spelling of 43220221013 in words is "forty-three billion, two hundred twenty million, two hundred twenty-one thousand, thirteen".