7216565 has 8 divisors (see below), whose sum is σ = 8757720. Its totient is φ = 5708032.

The previous prime is 7216543. The next prime is 7216567. The reversal of 7216565 is 5656127.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 708964 + 6507601 = 842^2 + 2551^2 .

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 7216565 - 2⁸ = 7216309 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216567) 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, 7664 + ... + 8553.

It is an arithmetic number, because the mean of its divisors is an integer number (1094715).

Almost surely, 2^7216565 is an apocalyptic number.

It is an amenable number.

7216565 is a deficient number, since it is larger than the sum of its proper divisors (1541155).

7216565 is a wasteful number, since it uses less digits than its factorization.

7216565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16311.

The product of its digits is 12600, while the sum is 32.

The square root of 7216565 is about 2686.3665051515. The cubic root of 7216565 is about 193.2458499031.

The spelling of 7216565 in words is "seven million, two hundred sixteen thousand, five hundred sixty-five".