22206605 has 12 divisors (see below), whose sum is σ = 27603732. Its totient is φ = 17149440.

The previous prime is 22206601. The next prime is 22206617. The reversal of 22206605 is 50660222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1394761 + 20811844 = 1181^2 + 4562^2 .

It is not a de Polignac number, because 22206605 - 2² = 22206601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22206601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (2300311).

Almost surely, 2^22206605 is an apocalyptic number.

It is an amenable number.

22206605 is a deficient number, since it is larger than the sum of its proper divisors (5397127).

22206605 is an equidigital number, since it uses as much as digits as its factorization.

22206605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344 (or 5315 counting only the distinct ones).

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

The square root of 22206605 is about 4712.3884602184. The cubic root of 22206605 is about 281.0783459561.

Adding to 22206605 its reverse (50660222), we get a palindrome (72866827).

The spelling of 22206605 in words is "twenty-two million, two hundred six thousand, six hundred five".