21233222 has 8 divisors (see below), whose sum is σ = 33526200. Its totient is φ = 10057824.

The previous prime is 21233213. The next prime is 21233239. The reversal of 21233222 is 22233212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21233222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279347 + ... + 279422.

It is an arithmetic number, because the mean of its divisors is an integer number (4190775).

Almost surely, 2^21233222 is an apocalyptic number.

21233222 is a deficient number, since it is larger than the sum of its proper divisors (12292978).

21233222 is a wasteful number, since it uses less digits than its factorization.

21233222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558790.

The product of its digits is 288, while the sum is 17.

The square root of 21233222 is about 4607.9520396810. The cubic root of 21233222 is about 276.9099960860.

Adding to 21233222 its reverse (22233212), we get a palindrome (43466434).

The spelling of 21233222 in words is "twenty-one million, two hundred thirty-three thousand, two hundred twenty-two".