3117492181 has 4 divisors (see below), whose sum is σ = 3300874092. Its totient is φ = 2934110272.

The previous prime is 3117492179. The next prime is 3117492193. The reversal of 3117492181 is 1812947113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1812947113 = 199 ⋅9110287.

It can be written as a sum of positive squares in 2 ways, for example, as 1269781956 + 1847710225 = 35634^2 + 42985^2 .

It is a cyclic number.

It is not a de Polignac number, because 3117492181 - 2¹ = 3117492179 is a prime.

It is a super-2 number, since 2×3117492181² = 19437514997192273522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3117492181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3117492121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91690930 + ... + 91690963.

It is an arithmetic number, because the mean of its divisors is an integer number (825218523).

Almost surely, 2^3117492181 is an apocalyptic number.

It is an amenable number.

3117492181 is a deficient number, since it is larger than the sum of its proper divisors (183381911).

3117492181 is a wasteful number, since it uses less digits than its factorization.

3117492181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183381910.

The product of its digits is 12096, while the sum is 37.

The square root of 3117492181 is about 55834.5070811949. The cubic root of 3117492181 is about 1460.8371037656.

The spelling of 3117492181 in words is "three billion, one hundred seventeen million, four hundred ninety-two thousand, one hundred eighty-one".