222420216 has 16 divisors (see below), whose sum is σ = 556050600. Its totient is φ = 74140064.

The previous prime is 222420199. The next prime is 222420217. The reversal of 222420216 is 612024222.

It is a junction number, because it is equal to n+sod(n) for n = 222420192 and 222420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222420217) 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, 4633731 + ... + 4633778.

Almost surely, 2^222420216 is an apocalyptic number.

It is an amenable number.

222420216 is an abundant number, since it is smaller than the sum of its proper divisors (333630384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222420216 is a wasteful number, since it uses less digits than its factorization.

222420216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9267518 (or 9267514 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 222420216 is about 14913.7592846338. The cubic root of 222420216 is about 605.8867001638.

Adding to 222420216 its reverse (612024222), we get a palindrome (834444438).

The spelling of 222420216 in words is "two hundred twenty-two million, four hundred twenty thousand, two hundred sixteen".