22320221 has 16 divisors (see below), whose sum is σ = 28149120. Its totient is φ = 17191680.

The previous prime is 22320211. The next prime is 22320223. The reversal of 22320221 is 12202322.

It is not a de Polignac number, because 22320221 - 2¹⁴ = 22303837 is a prime.

It is a super-3 number, since 3×22320221³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22320196 and 22320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5225 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (1759320).

Almost surely, 2^22320221 is an apocalyptic number.

It is an amenable number.

22320221 is a deficient number, since it is larger than the sum of its proper divisors (5828899).

22320221 is a wasteful number, since it uses less digits than its factorization.

22320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22320221 is about 4724.4281135392. The cubic root of 22320221 is about 281.5568925936.

Adding to 22320221 its reverse (12202322), we get a palindrome (34522543).

The spelling of 22320221 in words is "twenty-two million, three hundred twenty thousand, two hundred twenty-one".