22303312 has 10 divisors (see below), whose sum is σ = 43212698. Its totient is φ = 11151648.

The previous prime is 22303289. The next prime is 22303319. The reversal of 22303312 is 21330322.

It can be written as a sum of positive squares in only one way, i.e., 12418576 + 9884736 = 3524^2 + 3144^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 1393957 = 22303312 / (2 + 2 + 3 + 0 + 3 + 3 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22303319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696963 + ... + 696994.

Almost surely, 2^22303312 is an apocalyptic number.

It is an amenable number.

22303312 is a deficient number, since it is larger than the sum of its proper divisors (20909386).

22303312 is a wasteful number, since it uses less digits than its factorization.

22303312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393965 (or 1393959 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 22303312 is about 4722.6382457266. The cubic root of 22303312 is about 281.4857754928.

Adding to 22303312 its reverse (21330322), we get a palindrome (43633634).

The spelling of 22303312 in words is "twenty-two million, three hundred three thousand, three hundred twelve".