22218667 has 4 divisors (see below), whose sum is σ = 23184720. Its totient is φ = 21252616.

The previous prime is 22218649. The next prime is 22218683. The reversal of 22218667 is 76681222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76681222 = 2 ⋅38340611.

It is a cyclic number.

It is not a de Polignac number, because 22218667 - 2¹¹ = 22216619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22218617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482992 + ... + 483037.

It is an arithmetic number, because the mean of its divisors is an integer number (5796180).

Almost surely, 2^22218667 is an apocalyptic number.

22218667 is a deficient number, since it is larger than the sum of its proper divisors (966053).

22218667 is an equidigital number, since it uses as much as digits as its factorization.

22218667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966052.

The product of its digits is 16128, while the sum is 34.

The square root of 22218667 is about 4713.6681045657. The cubic root of 22218667 is about 281.1292280149.

Adding to 22218667 its reverse (76681222), we get a palindrome (98899889).

The spelling of 22218667 in words is "twenty-two million, two hundred eighteen thousand, six hundred sixty-seven".