5138818133 has 4 divisors (see below), whose sum is σ = 5138966988. Its totient is φ = 5138669280.

The previous prime is 5138818127. The next prime is 5138818187. The reversal of 5138818133 is 3318188315.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3910876369 + 1227941764 = 62537^2 + 35042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5138818133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138814133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7193 + ... + 101633.

It is an arithmetic number, because the mean of its divisors is an integer number (1284741747).

Almost surely, 2^5138818133 is an apocalyptic number.

It is an amenable number.

5138818133 is a deficient number, since it is larger than the sum of its proper divisors (148855).

5138818133 is an equidigital number, since it uses as much as digits as its factorization.

5138818133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148854.

The product of its digits is 69120, while the sum is 41.

The square root of 5138818133 is about 71685.5503780225. The cubic root of 5138818133 is about 1725.6567556501.

The spelling of 5138818133 in words is "five billion, one hundred thirty-eight million, eight hundred eighteen thousand, one hundred thirty-three".