22220216 has 8 divisors (see below), whose sum is σ = 41662920. Its totient is φ = 11110104.

The previous prime is 22220213. The next prime is 22220227. The reversal of 22220216 is 61202222.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22220194 and 22220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388756 + ... + 1388771.

It is an arithmetic number, because the mean of its divisors is an integer number (5207865).

Almost surely, 2^22220216 is an apocalyptic number.

It is an amenable number.

22220216 is a deficient number, since it is larger than the sum of its proper divisors (19442704).

22220216 is a wasteful number, since it uses less digits than its factorization.

22220216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777533 (or 2777529 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22220216 is about 4713.8324111067. The cubic root of 22220216 is about 281.1357609458.

Adding to 22220216 its reverse (61202222), we get a palindrome (83422438).

The spelling of 22220216 in words is "twenty-two million, two hundred twenty thousand, two hundred sixteen".