21334223 has 8 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 20898328.

The previous prime is 21334219. The next prime is 21334241. The reversal of 21334223 is 32243312.

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

It is a cyclic number.

It is not a de Polignac number, because 21334223 - 2² = 21334219 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21334195 and 21334204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24290 + ... + 25152.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^21334223 is an apocalyptic number.

21334223 is a deficient number, since it is larger than the sum of its proper divisors (438577).

21334223 is an equidigital number, since it uses as much as digits as its factorization.

21334223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its digits is 864, while the sum is 20.

The square root of 21334223 is about 4618.8984617547. The cubic root of 21334223 is about 277.3483650642.

Adding to 21334223 its reverse (32243312), we get a palindrome (53577535).

The spelling of 21334223 in words is "twenty-one million, three hundred thirty-four thousand, two hundred twenty-three".