22138212 has 24 divisors (see below), whose sum is σ = 51752512. Its totient is φ = 7365600.

The previous prime is 22138189. The next prime is 22138219. The reversal of 22138212 is 21283122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22138219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6537 + ... + 9327.

Almost surely, 2^22138212 is an apocalyptic number.

It is an amenable number.

22138212 is an abundant number, since it is smaller than the sum of its proper divisors (29614300).

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

22138212 is a wasteful number, since it uses less digits than its factorization.

22138212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3457 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 22138212 is about 4705.1261407108. The cubic root of 22138212 is about 280.7894895458.

The spelling of 22138212 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred twelve".