22207816 has 16 divisors (see below), whose sum is σ = 41692140. Its totient is φ = 11089920.

The previous prime is 22207813. The next prime is 22207817. The reversal of 22207816 is 61870222.

It can be written as a sum of positive squares in 2 ways, for example, as 22184100 + 23716 = 4710^2 + 154^2 .

It is not an unprimeable number, because it can be changed into a prime (22207813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8596 + ... + 10876.

Almost surely, 2^22207816 is an apocalyptic number.

It is an amenable number.

22207816 is a deficient number, since it is larger than the sum of its proper divisors (19484324).

22207816 is a wasteful number, since it uses less digits than its factorization.

22207816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504 (or 3500 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22207816 is about 4712.5169495716. The cubic root of 22207816 is about 281.0834552421.

The spelling of 22207816 in words is "twenty-two million, two hundred seven thousand, eight hundred sixteen".