21300222 has 16 divisors (see below), whose sum is σ = 43591680. Its totient is φ = 6934872.

The previous prime is 21300203. The next prime is 21300233. The reversal of 21300222 is 22200312.

It is a junction number, because it is equal to n+sod(n) for n = 21300198 and 21300207.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41022 + ... + 41537.

It is an arithmetic number, because the mean of its divisors is an integer number (2724480).

Almost surely, 2^21300222 is an apocalyptic number.

21300222 is an abundant number, since it is smaller than the sum of its proper divisors (22291458).

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

21300222 is a wasteful number, since it uses less digits than its factorization.

21300222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82607.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 21300222 is about 4615.2163546252. The cubic root of 21300222 is about 277.2009472137.

Adding to 21300222 its reverse (22200312), we get a palindrome (43500534).

The spelling of 21300222 in words is "twenty-one million, three hundred thousand, two hundred twenty-two".