22212312 has 16 divisors (see below), whose sum is σ = 55530840. Its totient is φ = 7404096.

The previous prime is 22212301. The next prime is 22212329. The reversal of 22212312 is 21321222.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22212291 and 22212300.

It is a congruent number.

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, 462733 + ... + 462780.

Almost surely, 2^22212312 is an apocalyptic number.

It is an amenable number.

22212312 is an abundant number, since it is smaller than the sum of its proper divisors (33318528).

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

22212312 is a wasteful number, since it uses less digits than its factorization.

22212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925522 (or 925518 counting only the distinct ones).

The product of its digits is 96, while the sum is 15.

The square root of 22212312 is about 4712.9939528924. The cubic root of 22212312 is about 281.1024225273.

Adding to 22212312 its reverse (21321222), we get a palindrome (43533534).

The spelling of 22212312 in words is "twenty-two million, two hundred twelve thousand, three hundred twelve".