22220372 has 12 divisors (see below), whose sum is σ = 39287220. Its totient is φ = 10995456.

The previous prime is 22220371. The next prime is 22220381. The reversal of 22220372 is 27302222.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 5541316 = 4084^2 + 2354^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220371) 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 3 ways as a sum of consecutive naturals, for example, 28247 + ... + 29022.

It is an arithmetic number, because the mean of its divisors is an integer number (3273935).

Almost surely, 2^22220372 is an apocalyptic number.

It is an amenable number.

22220372 is a deficient number, since it is larger than the sum of its proper divisors (17066848).

22220372 is a wasteful number, since it uses less digits than its factorization.

22220372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57370 (or 57368 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 22220372 is about 4713.8489581233. The cubic root of 22220372 is about 281.1364188614.

Adding to 22220372 its reverse (27302222), we get a palindrome (49522594).

The spelling of 22220372 in words is "twenty-two million, two hundred twenty thousand, three hundred seventy-two".