4543138081 has 2 divisors, whose sum is σ = 4543138082. Its totient is φ = 4543138080.

The previous prime is 4543138063. The next prime is 4543138087. The reversal of 4543138081 is 1808313454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4159605025 + 383533056 = 64495^2 + 19584^2 .

It is a cyclic number.

It is not a de Polignac number, because 4543138081 - 2¹¹ = 4543136033 is a prime.

It is a super-3 number, since 3×4543138081³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 4543138081.

It is not a weakly prime, because it can be changed into another prime (4543138087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271569040 + 2271569041.

It is an arithmetic number, because the mean of its divisors is an integer number (2271569041).

Almost surely, 2^4543138081 is an apocalyptic number.

It is an amenable number.

4543138081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4543138081 is an equidigital number, since it uses as much as digits as its factorization.

4543138081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 4543138081 is about 67402.8046968374. The cubic root of 4543138081 is about 1656.2223675162. Note that the first 3 decimals are identical.

The spelling of 4543138081 in words is "four billion, five hundred forty-three million, one hundred thirty-eight thousand, eighty-one".