5818181 has 8 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 5662800.

The previous prime is 5818159. The next prime is 5818193. The reversal of 5818181 is 1818185.

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

It is a cyclic number.

It is not a de Polignac number, because 5818181 - 2⁶ = 5818117 is a prime.

It is a super-2 number, since 2×5818181² = 67702460297522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5818121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7640 + ... + 8366.

It is an arithmetic number, because the mean of its divisors is an integer number (746928).

Almost surely, 2^5818181 is an apocalyptic number.

It is an amenable number.

5818181 is a deficient number, since it is larger than the sum of its proper divisors (157243).

5818181 is a wasteful number, since it uses less digits than its factorization.

5818181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 2560, while the sum is 32.

The square root of 5818181 is about 2412.0905870220. The cubic root of 5818181 is about 179.8577167782.

The spelling of 5818181 in words is "five million, eight hundred eighteen thousand, one hundred eighty-one".