21325443 has 8 divisors (see below), whose sum is σ = 28715856. Its totient is φ = 14076000.

The previous prime is 21325441. The next prime is 21325457. The reversal of 21325443 is 34452312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21325443 - 2¹ = 21325441 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21325441) 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 7 ways as a sum of consecutive naturals, for example, 34888 + ... + 35493.

It is an arithmetic number, because the mean of its divisors is an integer number (3589482).

Almost surely, 2^21325443 is an apocalyptic number.

21325443 is a deficient number, since it is larger than the sum of its proper divisors (7390413).

21325443 is a wasteful number, since it uses less digits than its factorization.

21325443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70485.

The product of its digits is 2880, while the sum is 24.

The square root of 21325443 is about 4617.9479208843. The cubic root of 21325443 is about 277.3103127015.

Adding to 21325443 its reverse (34452312), we get a palindrome (55777755).

The spelling of 21325443 in words is "twenty-one million, three hundred twenty-five thousand, four hundred forty-three".