2220003 has 24 divisors (see below), whose sum is σ = 3386240. Its totient is φ = 1399680.

The previous prime is 2219999. The next prime is 2220007. The reversal of 2220003 is 3000222.

It is an interprime number because it is at equal distance from previous prime (2219999) and next prime (2220007).

It is not a de Polignac number, because 2220003 - 2² = 2219999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

2220003 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20313 + ... + 20421.

2^2220003 is an apocalyptic number.

2220003 is a deficient number, since it is larger than the sum of its proper divisors (1166237).

2220003 is a wasteful number, since it uses less digits than its factorization.

2220003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 2220003 is about 1489.9674493089. The cubic root of 2220003 is about 130.4521337642.

Adding to 2220003 its reverse (3000222), we get a palindrome (5220225).

The spelling of 2220003 in words is "two million, two hundred twenty thousand, three".