22150565 has 4 divisors (see below), whose sum is σ = 26580684. Its totient is φ = 17720448.

The previous prime is 22150553. The next prime is 22150567. The reversal of 22150565 is 56505122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56505122 = 2 ⋅28252561.

It can be written as a sum of positive squares in 2 ways, for example, as 5885476 + 16265089 = 2426^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 22150565 - 2⁴ = 22150549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22150567) 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, 2215052 + ... + 2215061.

It is an arithmetic number, because the mean of its divisors is an integer number (6645171).

Almost surely, 2^22150565 is an apocalyptic number.

It is an amenable number.

22150565 is a deficient number, since it is larger than the sum of its proper divisors (4430119).

22150565 is an equidigital number, since it uses as much as digits as its factorization.

22150565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430118.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 22150565 is about 4706.4386748368. The cubic root of 22150565 is about 280.8417061628.

Adding to 22150565 its reverse (56505122), we get a palindrome (78655687).

The spelling of 22150565 in words is "twenty-two million, one hundred fifty thousand, five hundred sixty-five".