22236218 has 8 divisors (see below), whose sum is σ = 33660660. Its totient is φ = 11016000.

The previous prime is 22236211. The next prime is 22236233. The reversal of 22236218 is 81263222.

It can be written as a sum of positive squares in 2 ways, for example, as 21501769 + 734449 = 4637^2 + 857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (22236211) 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, 50783 + ... + 51218.

Almost surely, 2^22236218 is an apocalyptic number.

22236218 is a deficient number, since it is larger than the sum of its proper divisors (11424442).

22236218 is a wasteful number, since it uses less digits than its factorization.

22236218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102112.

The product of its digits is 2304, while the sum is 26.

The square root of 22236218 is about 4715.5294506556. The cubic root of 22236218 is about 281.2032318614.

The spelling of 22236218 in words is "twenty-two million, two hundred thirty-six thousand, two hundred eighteen".