22685216 has 12 divisors (see below), whose sum is σ = 44661582. Its totient is φ = 11342592.

The previous prime is 22685213. The next prime is 22685227. The reversal of 22685216 is 61258622.

It can be written as a sum of positive squares in only one way, i.e., 21196816 + 1488400 = 4604^2 + 1220^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 708913 = 22685216 / (2 + 2 + 6 + 8 + 5 + 2 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (22685213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354425 + ... + 354488.

Almost surely, 2^22685216 is an apocalyptic number.

It is an amenable number.

22685216 is a deficient number, since it is larger than the sum of its proper divisors (21976366).

22685216 is an equidigital number, since it uses as much as digits as its factorization.

22685216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708923 (or 708915 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 22685216 is about 4762.8999569590. The cubic root of 22685216 is about 283.0833368839.

The spelling of 22685216 in words is "twenty-two million, six hundred eighty-five thousand, two hundred sixteen".