21733222 has 8 divisors (see below), whose sum is σ = 37256976. Its totient is φ = 9314232.

The previous prime is 21733219. The next prime is 21733241. The reversal of 21733222 is 22233712.

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 = 21733193 and 21733202.

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, 776173 + ... + 776200.

It is an arithmetic number, because the mean of its divisors is an integer number (4657122).

Almost surely, 2^21733222 is an apocalyptic number.

21733222 is a deficient number, since it is larger than the sum of its proper divisors (15523754).

21733222 is a wasteful number, since it uses less digits than its factorization.

21733222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552382.

The product of its digits is 1008, while the sum is 22.

The square root of 21733222 is about 4661.8903891018. The cubic root of 21733222 is about 279.0667140899.

Adding to 21733222 its reverse (22233712), we get a palindrome (43966934).

The spelling of 21733222 in words is "twenty-one million, seven hundred thirty-three thousand, two hundred twenty-two".