2208321 has 12 divisors (see below), whose sum is σ = 3300180. Its totient is φ = 1421280.

The previous prime is 2208319. The next prime is 2208331. The reversal of 2208321 is 1238022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1527696 + 680625 = 1236^2 + 825^2 .

It is not a de Polignac number, because 2208321 - 2¹ = 2208319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2208294 and 2208303.

It is not an unprimeable number, because it can be changed into a prime (2208331) 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, 3970 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (275015).

2^2208321 is an apocalyptic number.

It is an amenable number.

2208321 is a deficient number, since it is larger than the sum of its proper divisors (1091859).

2208321 is a wasteful number, since it uses less digits than its factorization.

2208321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496 (or 8493 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2208321 is about 1486.0420586242. The cubic root of 2208321 is about 130.2229114401. Note that the first 3 decimals are identical.

Subtracting from 2208321 its reverse (1238022), we obtain a cube (970299 = 99³).

The spelling of 2208321 in words is "two million, two hundred eight thousand, three hundred twenty-one".