22006156 has 24 divisors (see below), whose sum is σ = 40162304. Its totient is φ = 10538640.

The previous prime is 22006133. The next prime is 22006163. The reversal of 22006156 is 65160022.

22006156 = T₁₁₇₆ + T₁₁₇₇ + ... + T₁₂₀₆.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11911 + ... + 13633.

Almost surely, 2^22006156 is an apocalyptic number.

It is an amenable number.

22006156 is a deficient number, since it is larger than the sum of its proper divisors (18156148).

22006156 is a wasteful number, since it uses less digits than its factorization.

22006156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 22006156 is about 4691.0719457284. The cubic root of 22006156 is about 280.2300660132.

Adding to 22006156 its reverse (65160022), we get a palindrome (87166178).

The spelling of 22006156 in words is "twenty-two million, six thousand, one hundred fifty-six".