5821218 has 24 divisors (see below), whose sum is σ = 13583388. Its totient is φ = 1791072.

The previous prime is 5821213. The next prime is 5821229. The reversal of 5821218 is 8121285.

It can be written as a sum of positive squares in 2 ways, for example, as 4149369 + 1671849 = 2037^2 + 1293^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5821191 and 5821200.

It is not an unprimeable number, because it can be changed into a prime (5821213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12205 + ... + 12672.

Almost surely, 2^5821218 is an apocalyptic number.

5821218 is an abundant number, since it is smaller than the sum of its proper divisors (7762170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5821218 is a wasteful number, since it uses less digits than its factorization.

5821218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24898 (or 24895 counting only the distinct ones).

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

The square root of 5821218 is about 2412.7200417786. The cubic root of 5821218 is about 179.8890056451.

The spelling of 5821218 in words is "five million, eight hundred twenty-one thousand, two hundred eighteen".