21332200 has 24 divisors (see below), whose sum is σ = 49597830. Its totient is φ = 8532800.

The previous prime is 21332189. The next prime is 21332209. The reversal of 21332200 is 223312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18714276 + 2617924 = 4326^2 + 1618^2 .

It is not an unprimeable number, because it can be changed into a prime (21332209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53131 + ... + 53530.

Almost surely, 2^21332200 is an apocalyptic number.

21332200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332200 is an abundant number, since it is smaller than the sum of its proper divisors (28265630).

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

21332200 is a wasteful number, since it uses less digits than its factorization.

21332200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106677 (or 106668 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21332200 is about 4618.6794649553. The cubic root of 21332200 is about 277.3395983443.

Adding to 21332200 its reverse (223312), we get a palindrome (21555512).

The spelling of 21332200 in words is "twenty-one million, three hundred thirty-two thousand, two hundred".