6221565 has 24 divisors (see below), whose sum is σ = 12325248. Its totient is φ = 2844000.

The previous prime is 6221563. The next prime is 6221591. The reversal of 6221565 is 5651226.

It is not a de Polignac number, because 6221565 - 2¹ = 6221563 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9561 + ... + 10190.

It is an arithmetic number, because the mean of its divisors is an integer number (513552).

Almost surely, 2^6221565 is an apocalyptic number.

It is an amenable number.

6221565 is a deficient number, since it is larger than the sum of its proper divisors (6103683).

6221565 is a wasteful number, since it uses less digits than its factorization.

6221565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19769 (or 19766 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 6221565 is about 2494.3065168499. The cubic root of 6221565 is about 183.9218023893.

It can be divided in two parts, 6221 and 565, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 6221565 in words is "six million, two hundred twenty-one thousand, five hundred sixty-five".