2220321 has 8 divisors (see below), whose sum is σ = 3116320. Its totient is φ = 1402272.

The previous prime is 2220311. The next prime is 2220331. The reversal of 2220321 is 1230222.

It is an interprime number because it is at equal distance from previous prime (2220311) and next prime (2220331).

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

It is not a de Polignac number, because 2220321 - 2⁵ = 2220289 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220297 and 2220306.

It is not an unprimeable number, because it can be changed into a prime (2220301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19420 + ... + 19533.

It is an arithmetic number, because the mean of its divisors is an integer number (389540).

2^2220321 is an apocalyptic number.

It is an amenable number.

2220321 is a deficient number, since it is larger than the sum of its proper divisors (895999).

2220321 is a wasteful number, since it uses less digits than its factorization.

2220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38975.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2220321 is about 1490.0741592283. The cubic root of 2220321 is about 130.4583622540.

Adding to 2220321 its reverse (1230222), we get a palindrome (3450543).

Subtracting from 2220321 its reverse (1230222), we obtain a palindrome (990099).

The spelling of 2220321 in words is "two million, two hundred twenty thousand, three hundred twenty-one".