21600271 has 16 divisors (see below), whose sum is σ = 27111168. Its totient is φ = 16718400.

The previous prime is 21600269. The next prime is 21600277. The reversal of 21600271 is 17200612.

It is a cyclic number.

It is not a de Polignac number, because 21600271 - 2¹ = 21600269 is a prime.

21600271 is a modest number, since divided by 271 gives 216 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11691 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (1694448).

Almost surely, 2^21600271 is an apocalyptic number.

21600271 is a deficient number, since it is larger than the sum of its proper divisors (5510897).

21600271 is a wasteful number, since it uses less digits than its factorization.

21600271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21600271 is about 4647.6091703154. The cubic root of 21600271 is about 278.4964947069.

Adding to 21600271 its reverse (17200612), we get a palindrome (38800883).

The spelling of 21600271 in words is "twenty-one million, six hundred thousand, two hundred seventy-one".