22312212 has 48 divisors (see below), whose sum is σ = 56485632. Its totient is φ = 6814080.

The previous prime is 22312193. The next prime is 22312217. The reversal of 22312212 is 21221322.

It is a happy number.

It is a super-3 number, since 3×22312212³ (a number of 23 digits) contains 333 as substring.

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 = 22312191 and 22312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312217) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 24037 + ... + 24947.

It is an arithmetic number, because the mean of its divisors is an integer number (1176784).

Almost surely, 2^22312212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22312212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28242816).

22312212 is an abundant number, since it is smaller than the sum of its proper divisors (34173420).

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

22312212 is a wasteful number, since it uses less digits than its factorization.

22312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1086 counting only the distinct ones).

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

The square root of 22312212 is about 4723.5804216717. The cubic root of 22312212 is about 281.5232122383.

Adding to 22312212 its reverse (21221322), we get a palindrome (43533534).

The spelling of 22312212 in words is "twenty-two million, three hundred twelve thousand, two hundred twelve".