43005544157 has 2 divisors, whose sum is σ = 43005544158. Its totient is φ = 43005544156.

The previous prime is 43005544061. The next prime is 43005544159. The reversal of 43005544157 is 75144550034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42903251161 + 102292996 = 207131^2 + 10114^2 .

It is a cyclic number.

It is not a de Polignac number, because 43005544157 - 2³⁰ = 41931802333 is a prime.

Together with 43005544159, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43005544157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43005544159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21502772078 + 21502772079.

It is an arithmetic number, because the mean of its divisors is an integer number (21502772079).

Almost surely, 2^43005544157 is an apocalyptic number.

It is an amenable number.

43005544157 is a deficient number, since it is larger than the sum of its proper divisors (1).

43005544157 is an equidigital number, since it uses as much as digits as its factorization.

43005544157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 43005544157 in words is "forty-three billion, five million, five hundred forty-four thousand, one hundred fifty-seven".