21222334 has 8 divisors (see below), whose sum is σ = 36381168. Its totient is φ = 9095280.

The previous prime is 21222293. The next prime is 21222343. The reversal of 21222334 is 43322212.

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

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, 757927 + ... + 757954.

It is an arithmetic number, because the mean of its divisors is an integer number (4547646).

Almost surely, 2^21222334 is an apocalyptic number.

21222334 is a deficient number, since it is larger than the sum of its proper divisors (15158834).

21222334 is a wasteful number, since it uses less digits than its factorization.

21222334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515890.

The product of its digits is 576, while the sum is 19.

The square root of 21222334 is about 4606.7704522800. The cubic root of 21222334 is about 276.8626565673.

Adding to 21222334 its reverse (43322212), we get a palindrome (64544546).

The spelling of 21222334 in words is "twenty-one million, two hundred twenty-two thousand, three hundred thirty-four".