22131208 has 16 divisors (see below), whose sum is σ = 45268560. Its totient is φ = 10059600.

The previous prime is 22131199. The next prime is 22131211. The reversal of 22131208 is 80213122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125658 + ... + 125833.

It is an arithmetic number, because the mean of its divisors is an integer number (2829285).

Almost surely, 2^22131208 is an apocalyptic number.

It is an amenable number.

22131208 is an abundant number, since it is smaller than the sum of its proper divisors (23137352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131208 is a wasteful number, since it uses less digits than its factorization.

22131208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251508 (or 251504 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22131208 is about 4704.3817872277. The cubic root of 22131208 is about 280.7598747329.

The spelling of 22131208 in words is "twenty-two million, one hundred thirty-one thousand, two hundred eight".