22145216 has 28 divisors (see below), whose sum is σ = 44165520. Its totient is φ = 11016960.

The previous prime is 22145209. The next prime is 22145243. The reversal of 22145216 is 61254122.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22145191 and 22145200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13901 + ... + 15411.

It is an arithmetic number, because the mean of its divisors is an integer number (1577340).

Almost surely, 2^22145216 is an apocalyptic number.

It is an amenable number.

22145216 is a deficient number, since it is larger than the sum of its proper divisors (22020304).

22145216 is a wasteful number, since it uses less digits than its factorization.

22145216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 1742 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 22145216 is about 4705.8703764553. The cubic root of 22145216 is about 280.8190981131.

Adding to 22145216 its reverse (61254122), we get a palindrome (83399338).

The spelling of 22145216 in words is "twenty-two million, one hundred forty-five thousand, two hundred sixteen".