22144138 has 4 divisors (see below), whose sum is σ = 33216210. Its totient is φ = 11072068.

The previous prime is 22144117. The next prime is 22144169. The reversal of 22144138 is 83144122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83144122 = 2 ⋅41572061.

It can be written as a sum of positive squares in only one way, i.e., 13126129 + 9018009 = 3623^2 + 3003^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5536033 + ... + 5536036.

Almost surely, 2^22144138 is an apocalyptic number.

22144138 is a deficient number, since it is larger than the sum of its proper divisors (11072072).

22144138 is a wasteful number, since it uses less digits than its factorization.

22144138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072071.

The product of its digits is 1536, while the sum is 25.

The square root of 22144138 is about 4705.7558372699. The cubic root of 22144138 is about 280.8145414043.

The spelling of 22144138 in words is "twenty-two million, one hundred forty-four thousand, one hundred thirty-eight".