5918181 has 8 divisors (see below), whose sum is σ = 7902624. Its totient is φ = 3939600.

The previous prime is 5918173. The next prime is 5918189. The reversal of 5918181 is 1818195.

It is an interprime number because it is at equal distance from previous prime (5918173) and next prime (5918189).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5918181 - 2³ = 5918173 is a prime.

It is a super-2 number, since 2×5918181² = 70049732697522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

5918181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5918189) 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 7 ways as a sum of consecutive naturals, for example, 2215 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (987828).

Almost surely, 2^5918181 is an apocalyptic number.

It is an amenable number.

5918181 is a deficient number, since it is larger than the sum of its proper divisors (1984443).

5918181 is a wasteful number, since it uses less digits than its factorization.

5918181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931.

The product of its digits is 2880, while the sum is 33.

The square root of 5918181 is about 2432.7311812035. The cubic root of 5918181 is about 180.8823039569.

The spelling of 5918181 in words is "five million, nine hundred eighteen thousand, one hundred eighty-one".