22240217 has 4 divisors (see below), whose sum is σ = 22260660. Its totient is φ = 22219776.

The previous prime is 22240201. The next prime is 22240223. The reversal of 22240217 is 71204222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16556761 + 5683456 = 4069^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 22240217 - 2⁴ = 22240201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22240247) 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, 8492 + ... + 10797.

It is an arithmetic number, because the mean of its divisors is an integer number (5565165).

Almost surely, 2^22240217 is an apocalyptic number.

It is an amenable number.

22240217 is a deficient number, since it is larger than the sum of its proper divisors (20443).

22240217 is a wasteful number, since it uses less digits than its factorization.

22240217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22240217 is about 4715.9534560892. The cubic root of 22240217 is about 281.2200882098.

Adding to 22240217 its reverse (71204222), we get a palindrome (93444439).

The spelling of 22240217 in words is "twenty-two million, two hundred forty thousand, two hundred seventeen".