21200199 has 8 divisors (see below), whose sum is σ = 28342272. Its totient is φ = 14095800.

The previous prime is 21200191. The next prime is 21200209. The reversal of 21200199 is 99100212.

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

It is not a de Polignac number, because 21200199 - 2³ = 21200191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200191) 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, 8077 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (3542784).

Almost surely, 2^21200199 is an apocalyptic number.

21200199 is a deficient number, since it is larger than the sum of its proper divisors (7142073).

21200199 is a wasteful number, since it uses less digits than its factorization.

21200199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 21200199 is about 4604.3673832569. The cubic root of 21200199 is about 276.7663667063.

The spelling of 21200199 in words is "twenty-one million, two hundred thousand, one hundred ninety-nine".