22206065 has 24 divisors (see below), whose sum is σ = 31210920. Its totient is φ = 15122688.

The previous prime is 22206061. The next prime is 22206101. The reversal of 22206065 is 56060222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12544 + 22193521 = 112^2 + 4711^2 .

It is not a de Polignac number, because 22206065 - 2² = 22206061 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22206065.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22206061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56891 + ... + 57279.

It is an arithmetic number, because the mean of its divisors is an integer number (1300455).

Almost surely, 2^22206065 is an apocalyptic number.

It is an amenable number.

22206065 is a deficient number, since it is larger than the sum of its proper divisors (9004855).

22206065 is a wasteful number, since it uses less digits than its factorization.

With its successor (22206066) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (634).

22206065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22206065 is about 4712.3311640843. The cubic root of 22206065 is about 281.0760676018.

Adding to 22206065 its reverse (56060222), we get a palindrome (78266287).

The spelling of 22206065 in words is "twenty-two million, two hundred six thousand, sixty-five".