22218136 has 8 divisors (see below), whose sum is σ = 41659020. Its totient is φ = 11109064.

The previous prime is 22218127. The next prime is 22218137. The reversal of 22218136 is 63181222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22218136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22218137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388626 + ... + 1388641.

Almost surely, 2^22218136 is an apocalyptic number.

It is an amenable number.

22218136 is a deficient number, since it is larger than the sum of its proper divisors (19440884).

22218136 is a wasteful number, since it uses less digits than its factorization.

22218136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777273 (or 2777269 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 22218136 is about 4713.6117786682. The cubic root of 22218136 is about 281.1269884444.

Adding to 22218136 its reverse (63181222), we get a palindrome (85399358).

The spelling of 22218136 in words is "twenty-two million, two hundred eighteen thousand, one hundred thirty-six".