21200219 has 8 divisors (see below), whose sum is σ = 22390080. Its totient is φ = 20017800.

The previous prime is 21200209. The next prime is 21200233. The reversal of 21200219 is 91200212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200219 is a prime.

It is a super-2 number, since 2×21200219² = 898898571295922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200197 and 21200206.

It is not an unprimeable number, because it can be changed into a prime (21200209) 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, 4604 + ... + 7974.

It is an arithmetic number, because the mean of its divisors is an integer number (2798760).

Almost surely, 2^21200219 is an apocalyptic number.

21200219 is a deficient number, since it is larger than the sum of its proper divisors (1189861).

21200219 is a wasteful number, since it uses less digits than its factorization.

21200219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 21200219 is about 4604.3695551074. The cubic root of 21200219 is about 276.7664537389.

The spelling of 21200219 in words is "twenty-one million, two hundred thousand, two hundred nineteen".