2418221 has 12 divisors (see below), whose sum is σ = 2690100. Its totient is φ = 2171520.

The previous prime is 2418203. The next prime is 2418257. The reversal of 2418221 is 1228142.

It is a happy number.

2418221 is digitally balanced in base 2, 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 6 ways, for example, as 662596 + 1755625 = 814^2 + 1325^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2418221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2418193 and 2418202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2418421) 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 11 ways as a sum of consecutive naturals, for example, 6755 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (224175).

2^2418221 is an apocalyptic number.

It is an amenable number.

2418221 is a deficient number, since it is larger than the sum of its proper divisors (271879).

2418221 is a wasteful number, since it uses less digits than its factorization.

2418221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 2418221 is about 1555.0630212310. The cubic root of 2418221 is about 134.2245621992.

The spelling of 2418221 in words is "two million, four hundred eighteen thousand, two hundred twenty-one".