3116838181 has 4 divisors (see below), whose sum is σ = 3118063500. Its totient is φ = 3115612864.

The previous prime is 3116838143. The next prime is 3116838217. The reversal of 3116838181 is 1818386113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1818386113 = 17 ⋅106963889.

It can be written as a sum of positive squares in 2 ways, for example, as 2938615681 + 178222500 = 54209^2 + 13350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3116838181 is a prime.

It is a super-2 number, since 2×3116838181² = 19429360493078777522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3116838121) 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, 608836 + ... + 613933.

It is an arithmetic number, because the mean of its divisors is an integer number (779515875).

Almost surely, 2^3116838181 is an apocalyptic number.

It is an amenable number.

3116838181 is a deficient number, since it is larger than the sum of its proper divisors (1225319).

3116838181 is a wasteful number, since it uses less digits than its factorization.

3116838181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225318.

The product of its digits is 27648, while the sum is 40.

The square root of 3116838181 is about 55828.6501807092. The cubic root of 3116838181 is about 1460.7349432012.

The spelling of 3116838181 in words is "three billion, one hundred sixteen million, eight hundred thirty-eight thousand, one hundred eighty-one".