5818221 has 12 divisors (see below), whose sum is σ = 8429148. Its totient is φ = 3867264.

The previous prime is 5818193. The next prime is 5818229. The reversal of 5818221 is 1228185.

5818221 is a `hidden beast` number, since 581 + 82 + 2 + 1 = 666.

5818221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2842596 + 2975625 = 1686^2 + 1725^2 .

It is not a de Polignac number, because 5818221 - 2¹⁸ = 5556077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5818229) 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 11 ways as a sum of consecutive naturals, for example, 3151 + ... + 4643.

It is an arithmetic number, because the mean of its divisors is an integer number (702429).

Almost surely, 2^5818221 is an apocalyptic number.

It is an amenable number.

5818221 is a deficient number, since it is larger than the sum of its proper divisors (2610927).

5818221 is a wasteful number, since it uses less digits than its factorization.

5818221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1929 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 5818221 is about 2412.0988785703. The cubic root of 5818221 is about 179.8581289513.

The spelling of 5818221 in words is "five million, eight hundred eighteen thousand, two hundred twenty-one".