22133221 has 8 divisors (see below), whose sum is σ = 24213600. Its totient is φ = 20064240.

The previous prime is 22133203. The next prime is 22133263. The reversal of 22133221 is 12233122.

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 22133221 - 2⁷ = 22133093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22133195 and 22133204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22133021) 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, 1515 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (3026700).

Almost surely, 2^22133221 is an apocalyptic number.

It is an amenable number.

22133221 is a deficient number, since it is larger than the sum of its proper divisors (2080379).

22133221 is a wasteful number, since it uses less digits than its factorization.

22133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699.

The product of its digits is 144, while the sum is 16.

The square root of 22133221 is about 4704.5957318350. The cubic root of 22133221 is about 280.7683868830.

Adding to 22133221 its reverse (12233122), we get a palindrome (34366343).

Subtracting from 22133221 its reverse (12233122), we obtain a palindrome (9900099).

The spelling of 22133221 in words is "twenty-two million, one hundred thirty-three thousand, two hundred twenty-one".