43333443221 has 2 divisors, whose sum is σ = 43333443222. Its totient is φ = 43333443220.

The previous prime is 43333443161. The next prime is 43333443229. The reversal of 43333443221 is 12234433334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22048092196 + 21285351025 = 148486^2 + 145895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43333443221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43333443229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21666721610 + 21666721611.

It is an arithmetic number, because the mean of its divisors is an integer number (21666721611).

Almost surely, 2^43333443221 is an apocalyptic number.

It is an amenable number.

43333443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

43333443221 is an equidigital number, since it uses as much as digits as its factorization.

43333443221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 32.

Adding to 43333443221 its reverse (12234433334), we get a palindrome (55567876555).

The spelling of 43333443221 in words is "forty-three billion, three hundred thirty-three million, four hundred forty-three thousand, two hundred twenty-one".