43522221773 has 2 divisors, whose sum is σ = 43522221774. Its totient is φ = 43522221772.

The previous prime is 43522221767. The next prime is 43522221791. The reversal of 43522221773 is 37712222534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39569962084 + 3952259689 = 198922^2 + 62867^2 .

It is a cyclic number.

It is not a de Polignac number, because 43522221773 - 2⁸ = 43522221517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43522221073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21761110886 + 21761110887.

It is an arithmetic number, because the mean of its divisors is an integer number (21761110887).

Almost surely, 2^43522221773 is an apocalyptic number.

It is an amenable number.

43522221773 is a deficient number, since it is larger than the sum of its proper divisors (1).

43522221773 is an equidigital number, since it uses as much as digits as its factorization.

43522221773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 38.

The spelling of 43522221773 in words is "forty-three billion, five hundred twenty-two million, two hundred twenty-one thousand, seven hundred seventy-three".