21344222 has 8 divisors (see below), whose sum is σ = 32160576. Its totient is φ = 10624032.

The previous prime is 21344209. The next prime is 21344237. The reversal of 21344222 is 22244312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21344194 and 21344203.

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, 23483 + ... + 24374.

It is an arithmetic number, because the mean of its divisors is an integer number (4020072).

Almost surely, 2^21344222 is an apocalyptic number.

21344222 is a deficient number, since it is larger than the sum of its proper divisors (10816354).

21344222 is a wasteful number, since it uses less digits than its factorization.

21344222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48082.

The product of its digits is 768, while the sum is 20.

The square root of 21344222 is about 4619.9807358906. The cubic root of 21344222 is about 277.3916878382.

Adding to 21344222 its reverse (22244312), we get a palindrome (43588534).

The spelling of 21344222 in words is "twenty-one million, three hundred forty-four thousand, two hundred twenty-two".