43005544061 has 2 divisors, whose sum is σ = 43005544062. Its totient is φ = 43005544060.

The previous prime is 43005544051. The next prime is 43005544157. The reversal of 43005544061 is 16044550034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30084902500 + 12920641561 = 173450^2 + 113669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43005544061 is a prime.

It is a super-2 number, since 2×43005544061² (a number of 22 digits) contains 22 as substring.

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 (43005544031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21502772030 + 21502772031.

It is an arithmetic number, because the mean of its divisors is an integer number (21502772031).

Almost surely, 2^43005544061 is an apocalyptic number.

It is an amenable number.

43005544061 is a deficient number, since it is larger than the sum of its proper divisors (1).

43005544061 is an equidigital number, since it uses as much as digits as its factorization.

43005544061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 43005544061 in words is "forty-three billion, five million, five hundred forty-four thousand, sixty-one".