21214200 has 96 divisors (see below), whose sum is σ = 75173760. Its totient is φ = 4848000.

The previous prime is 21214187. The next prime is 21214229. The reversal of 21214200 is 241212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1675 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (783060).

Almost surely, 2^21214200 is an apocalyptic number.

21214200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37586880).

21214200 is an abundant number, since it is smaller than the sum of its proper divisors (53959560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214200 is a wasteful number, since it uses less digits than its factorization.

21214200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077 (or 5068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21214200 is about 4605.8875366209. The cubic root of 21214200 is about 276.8272804925.

Adding to 21214200 its reverse (241212), we get a palindrome (21455412).

The spelling of 21214200 in words is "twenty-one million, two hundred fourteen thousand, two hundred".