43522221791 has 2 divisors, whose sum is σ = 43522221792. Its totient is φ = 43522221790.

The previous prime is 43522221773. The next prime is 43522221811. The reversal of 43522221791 is 19712222534.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43522221791 - 2²⁶ = 43455112927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43522221761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21761110895 + 21761110896.

It is an arithmetic number, because the mean of its divisors is an integer number (21761110896).

Almost surely, 2^43522221791 is an apocalyptic number.

43522221791 is a deficient number, since it is larger than the sum of its proper divisors (1).

43522221791 is an equidigital number, since it uses as much as digits as its factorization.

43522221791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The spelling of 43522221791 in words is "forty-three billion, five hundred twenty-two million, two hundred twenty-one thousand, seven hundred ninety-one".