2216403 has 24 divisors (see below), whose sum is σ = 3797248. Its totient is φ = 1265544.

The previous prime is 2216399. The next prime is 2216413. The reversal of 2216403 is 3046122.

It is a happy number.

2216403 is a `hidden beast` number, since 2 + 21 + 640 + 3 = 666.

2216403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2216403 - 2² = 2216399 is a prime.

2216403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2216413) 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 23 ways as a sum of consecutive naturals, for example, 1050 + ... + 2352.

2^2216403 is an apocalyptic number.

2216403 is a deficient number, since it is larger than the sum of its proper divisors (1580845).

2216403 is an equidigital number, since it uses as much as digits as its factorization.

2216403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2216403 is about 1488.7588790667. The cubic root of 2216403 is about 130.3815810423.

The spelling of 2216403 in words is "two million, two hundred sixteen thousand, four hundred three".