43000423244081 has 2 divisors, whose sum is σ = 43000423244082. Its totient is φ = 43000423244080.

The previous prime is 43000423243979. The next prime is 43000423244087. The reversal of 43000423244081 is 18044232400034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29213430453025 + 13786992791056 = 5404945^2 + 3713084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43000423244081 is a prime.

It is a super-2 number, since 2×43000423244081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43000423244087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21500211622040 + 21500211622041.

It is an arithmetic number, because the mean of its divisors is an integer number (21500211622041).

Almost surely, 2^{43000423244081} is an apocalyptic number.

It is an amenable number.

43000423244081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43000423244081 is an equidigital number, since it uses as much as digits as its factorization.

43000423244081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 35.

The spelling of 43000423244081 in words is "forty-three trillion, four hundred twenty-three million, two hundred forty-four thousand, eighty-one".