22028203 has 4 divisors (see below), whose sum is σ = 22038160. Its totient is φ = 22018248.

The previous prime is 22028191. The next prime is 22028213. The reversal of 22028203 is 30282022.

22028203 is a nontrivial binomial coefficient, being equal to C(6638, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(22028203) divides (22028203-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22028203 is a prime.

It is a deceptive number, since it divides R_22028202.

It is not an unprimeable number, because it can be changed into a prime (22028213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 6637.

It is an arithmetic number, because the mean of its divisors is an integer number (5509540).

Almost surely, 2^22028203 is an apocalyptic number.

22028203 is the 6637-th triangular number and also the 3319-th hexagonal number.

22028203 is the 2213-rd centered nonagonal number.

22028203 is a deficient number, since it is larger than the sum of its proper divisors (9957).

22028203 is an equidigital number, since it uses as much as digits as its factorization.

22028203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9956.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22028203 is about 4693.4212468092. The cubic root of 22028203 is about 280.3236181717.

The spelling of 22028203 in words is "twenty-two million, twenty-eight thousand, two hundred three".