21363222 has 8 divisors (see below), whose sum is σ = 42726456. Its totient is φ = 7121072.

The previous prime is 21363193. The next prime is 21363253. The reversal of 21363222 is 22236312.

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

21363222 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

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 3 ways as a sum of consecutive naturals, for example, 1780263 + ... + 1780274.

It is an arithmetic number, because the mean of its divisors is an integer number (5340807).

Almost surely, 2^21363222 is an apocalyptic number.

21363222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21363222 is a wasteful number, since it uses less digits than its factorization.

21363222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560542.

The product of its digits is 864, while the sum is 21.

The square root of 21363222 is about 4622.0365641133. The cubic root of 21363222 is about 277.4739720739.

Adding to 21363222 its reverse (22236312), we get a palindrome (43599534).

The spelling of 21363222 in words is "twenty-one million, three hundred sixty-three thousand, two hundred twenty-two".