21223334 has 8 divisors (see below), whose sum is σ = 34729128. Its totient is φ = 9646960.

The previous prime is 21223333. The next prime is 21223357. The reversal of 21223334 is 43332212.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482327 + ... + 482370.

It is an arithmetic number, because the mean of its divisors is an integer number (4341141).

Almost surely, 2^21223334 is an apocalyptic number.

21223334 is a deficient number, since it is larger than the sum of its proper divisors (13505794).

21223334 is a wasteful number, since it uses less digits than its factorization.

21223334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964710.

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

The square root of 21223334 is about 4606.8789869064. The cubic root of 21223334 is about 276.8670051042.

Adding to 21223334 its reverse (43332212), we get a palindrome (64555546).

The spelling of 21223334 in words is "twenty-one million, two hundred twenty-three thousand, three hundred thirty-four".