5138818431 has 4 divisors (see below), whose sum is σ = 6851757912. Its totient is φ = 3425878952.

The previous prime is 5138818393. The next prime is 5138818439. The reversal of 5138818431 is 1348188315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5138818431 - 2³¹ = 2991334783 is a prime.

It is a super-2 number, since 2×5138818431² = 52814909733570603522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138818439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856469736 + ... + 856469741.

It is an arithmetic number, because the mean of its divisors is an integer number (1712939478).

Almost surely, 2^5138818431 is an apocalyptic number.

5138818431 is a deficient number, since it is larger than the sum of its proper divisors (1712939481).

5138818431 is a wasteful number, since it uses less digits than its factorization.

5138818431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712939480.

The product of its digits is 92160, while the sum is 42.

The square root of 5138818431 is about 71685.5524565445. The cubic root of 5138818431 is about 1725.6567890071.

The spelling of 5138818431 in words is "five billion, one hundred thirty-eight million, eight hundred eighteen thousand, four hundred thirty-one".