21241343 has 2 divisors, whose sum is σ = 21241344. Its totient is φ = 21241342.

The previous prime is 21241333. The next prime is 21241361. The reversal of 21241343 is 34314212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241343 - 2⁴ = 21241327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620671 + 10620672.

It is an arithmetic number, because the mean of its divisors is an integer number (10620672).

Almost surely, 2^21241343 is an apocalyptic number.

21241343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241343 is an equidigital number, since it uses as much as digits as its factorization.

21241343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 21241343 is about 4608.8331495076. The cubic root of 21241343 is about 276.9452945355.

Adding to 21241343 its reverse (34314212), we get a palindrome (55555555).

The spelling of 21241343 in words is "twenty-one million, two hundred forty-one thousand, three hundred forty-three".