3220565 has 8 divisors (see below), whose sum is σ = 4092120. Its totient is φ = 2424832.

The previous prime is 3220561. The next prime is 3220577. The reversal of 3220565 is 5650223.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 323761 + 2896804 = 569^2 + 1702^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3220565 - 2² = 3220561 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 3220565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18860 + ... + 19029.

It is an arithmetic number, because the mean of its divisors is an integer number (511515).

Almost surely, 2^3220565 is an apocalyptic number.

It is an amenable number.

3220565 is a deficient number, since it is larger than the sum of its proper divisors (871555).

3220565 is a wasteful number, since it uses less digits than its factorization.

3220565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37911.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 3220565 is about 1794.5932686823. The cubic root of 3220565 is about 147.6762615627.

Adding to 3220565 its reverse (5650223), we get a palindrome (8870788).

The spelling of 3220565 in words is "three million, two hundred twenty thousand, five hundred sixty-five".