43220760991 has 2 divisors, whose sum is σ = 43220760992. Its totient is φ = 43220760990.

The previous prime is 43220760953. The next prime is 43220761033. The reversal of 43220760991 is 19906702234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43220760991 - 2¹⁷ = 43220629919 is a prime.

It is a super-2 number, since 2×43220760991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43220760931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610380495 + 21610380496.

It is an arithmetic number, because the mean of its divisors is an integer number (21610380496).

Almost surely, 2^43220760991 is an apocalyptic number.

43220760991 is a deficient number, since it is larger than the sum of its proper divisors (1).

43220760991 is an equidigital number, since it uses as much as digits as its factorization.

43220760991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 43220760991 in words is "forty-three billion, two hundred twenty million, seven hundred sixty thousand, nine hundred ninety-one".