21440522313443 has 32 divisors (see below), whose sum is σ = 22377954836160. Its totient is φ = 20524652121600.

The previous prime is 21440522313403. The next prime is 21440522313491. The reversal of 21440522313443 is 34431322504412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21440522313443 - 2³² = 21436227346147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21440522313397 and 21440522313406.

It is not an unprimeable number, because it can be changed into a prime (21440522313403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1465610453 + ... + 1465625081.

It is an arithmetic number, because the mean of its divisors is an integer number (699311088630).

Almost surely, 2^{21440522313443} is an apocalyptic number.

21440522313443 is a deficient number, since it is larger than the sum of its proper divisors (937432522717).

21440522313443 is a wasteful number, since it uses less digits than its factorization.

21440522313443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17207.

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 21440522313443 its reverse (34431322504412), we get a palindrome (55871844817855).

The spelling of 21440522313443 in words is "twenty-one trillion, four hundred forty billion, five hundred twenty-two million, three hundred thirteen thousand, four hundred forty-three".