10221565 has 8 divisors (see below), whose sum is σ = 12307680. Its totient is φ = 8149392.

The previous prime is 10221557. The next prime is 10221571. The reversal of 10221565 is 56512201.

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 10221565 - 2³ = 10221557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795 + ... + 4864.

It is an arithmetic number, because the mean of its divisors is an integer number (1538460).

Almost surely, 2^10221565 is an apocalyptic number.

It is an amenable number.

10221565 is a deficient number, since it is larger than the sum of its proper divisors (2086115).

10221565 is an equidigital number, since it uses as much as digits as its factorization.

10221565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 10221565 is about 3197.1182336598. The cubic root of 10221565 is about 217.0230177966.

Adding to 10221565 its reverse (56512201), we get a palindrome (66733766).

The spelling of 10221565 in words is "ten million, two hundred twenty-one thousand, five hundred sixty-five".