22219138 has 4 divisors (see below), whose sum is σ = 33328710. Its totient is φ = 11109568.

The previous prime is 22219121. The next prime is 22219139. The reversal of 22219138 is 83191222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 6671889 = 3943^2 + 2583^2 .

It is not an unprimeable number, because it can be changed into a prime (22219139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554783 + ... + 5554786.

Almost surely, 2^22219138 is an apocalyptic number.

22219138 is a deficient number, since it is larger than the sum of its proper divisors (11109572).

22219138 is a wasteful number, since it uses less digits than its factorization.

22219138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109571.

The product of its digits is 1728, while the sum is 28.

The square root of 22219138 is about 4713.7180653917. The cubic root of 22219138 is about 281.1312144966.

The spelling of 22219138 in words is "twenty-two million, two hundred nineteen thousand, one hundred thirty-eight".