43330232221 has 2 divisors, whose sum is σ = 43330232222. Its totient is φ = 43330232220.

The previous prime is 43330232219. The next prime is 43330232227. The reversal of 43330232221 is 12223203334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42493287321 + 836944900 = 206139^2 + 28930^2 .

It is a cyclic number.

It is not a de Polignac number, because 43330232221 - 2¹ = 43330232219 is a prime.

Together with 43330232219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43330232227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665116110 + 21665116111.

It is an arithmetic number, because the mean of its divisors is an integer number (21665116111).

Almost surely, 2^43330232221 is an apocalyptic number.

It is an amenable number.

43330232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

43330232221 is an equidigital number, since it uses as much as digits as its factorization.

43330232221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 43330232221 its reverse (12223203334), we get a palindrome (55553435555).

The spelling of 43330232221 in words is "forty-three billion, three hundred thirty million, two hundred thirty-two thousand, two hundred twenty-one".