21300271 has 6 divisors (see below), whose sum is σ = 21892920. Its totient is φ = 20723256.

The previous prime is 21300233. The next prime is 21300287. The reversal of 21300271 is 17200312.

It is a happy number.

It is not a de Polignac number, because 21300271 - 2⁷ = 21300143 is a prime.

It is a Duffinian number.

21300271 is a modest number, since divided by 271 gives 213 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6411 + ... + 9148.

It is an arithmetic number, because the mean of its divisors is an integer number (3648820).

Almost surely, 2^21300271 is an apocalyptic number.

21300271 is a deficient number, since it is larger than the sum of its proper divisors (592649).

21300271 is an equidigital number, since it uses as much as digits as its factorization.

21300271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15633 (or 15596 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 21300271 is about 4615.2216631490. The cubic root of 21300271 is about 277.2011597755.

Adding to 21300271 its reverse (17200312), we get a palindrome (38500583).

The spelling of 21300271 in words is "twenty-one million, three hundred thousand, two hundred seventy-one".