21223354 has 8 divisors (see below), whose sum is σ = 32064480. Its totient is φ = 10535196.

The previous prime is 21223333. The next prime is 21223357. The reversal of 21223354 is 45332212.

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

It is not an unprimeable number, because it can be changed into a prime (21223357) 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, 37894 + ... + 38449.

It is an arithmetic number, because the mean of its divisors is an integer number (4008060).

Almost surely, 2^21223354 is an apocalyptic number.

21223354 is a deficient number, since it is larger than the sum of its proper divisors (10841126).

21223354 is a wasteful number, since it uses less digits than its factorization.

21223354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76484.

The product of its digits is 1440, while the sum is 22.

The square root of 21223354 is about 4606.8811575729. The cubic root of 21223354 is about 276.8670920735.

Adding to 21223354 its reverse (45332212), we get a palindrome (66555566).

It can be divided in two parts, 2122 and 3354, that added together give a square (5476 = 74²).

The spelling of 21223354 in words is "twenty-one million, two hundred twenty-three thousand, three hundred fifty-four".