22271218 has 8 divisors (see below), whose sum is σ = 33459948. Its totient is φ = 11117904.

The previous prime is 22271213. The next prime is 22271219. The reversal of 22271218 is 81217222.

It can be written as a sum of positive squares in 2 ways, for example, as 21316689 + 954529 = 4617^2 + 977^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22271192 and 22271201.

It is not an unprimeable number, because it can be changed into a prime (22271213) 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, 7221 + ... + 9832.

Almost surely, 2^22271218 is an apocalyptic number.

22271218 is a deficient number, since it is larger than the sum of its proper divisors (11188730).

22271218 is a wasteful number, since it uses less digits than its factorization.

22271218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17708.

The product of its digits is 896, while the sum is 25.

The square root of 22271218 is about 4719.2391335892. The cubic root of 22271218 is about 281.3506932952.

The spelling of 22271218 in words is "twenty-two million, two hundred seventy-one thousand, two hundred eighteen".