22201565 has 8 divisors (see below), whose sum is σ = 26670168. Its totient is φ = 17742400.

The previous prime is 22201561. The next prime is 22201567. The reversal of 22201565 is 56510222.

It can be written as a sum of positive squares in 4 ways, for example, as 1069156 + 21132409 = 1034^2 + 4597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22201565 - 2² = 22201561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22201565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201561) 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 7 ways as a sum of consecutive naturals, for example, 4799 + ... + 8211.

It is an arithmetic number, because the mean of its divisors is an integer number (3333771).

Almost surely, 2^22201565 is an apocalyptic number.

It is an amenable number.

22201565 is a deficient number, since it is larger than the sum of its proper divisors (4468603).

22201565 is a wasteful number, since it uses less digits than its factorization.

22201565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22201565 is about 4711.8536692049. The cubic root of 22201565 is about 281.0570798800.

Adding to 22201565 its reverse (56510222), we get a palindrome (78711787).

The spelling of 22201565 in words is "twenty-two million, two hundred one thousand, five hundred sixty-five".