22223772 has 18 divisors (see below), whose sum is σ = 56176848. Its totient is φ = 7407912.

The previous prime is 22223771. The next prime is 22223779. The reversal of 22223772 is 27732222.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223771) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 308628 + ... + 308699.

It is an arithmetic number, because the mean of its divisors is an integer number (3120936).

Almost surely, 2^22223772 is an apocalyptic number.

It is an amenable number.

22223772 is an abundant number, since it is smaller than the sum of its proper divisors (33953076).

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

22223772 is a wasteful number, since it uses less digits than its factorization.

22223772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617337 (or 617332 counting only the distinct ones).

The product of its digits is 4704, while the sum is 27.

The square root of 22223772 is about 4714.2095838009. The cubic root of 22223772 is about 281.1507572813.

Adding to 22223772 its reverse (27732222), we get a palindrome (49955994).

The spelling of 22223772 in words is "twenty-two million, two hundred twenty-three thousand, seven hundred seventy-two".