21431313032443 has 8 divisors (see below), whose sum is σ = 22104004345920. Its totient is φ = 20767651132800.

The previous prime is 21431313032431. The next prime is 21431313032453. The reversal of 21431313032443 is 34423031313412.

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

It is a cyclic number.

It is not a de Polignac number, because 21431313032443 - 2⁵ = 21431313032411 is a prime.

It is a super-2 number, since 2×21431313032443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21431313032399 and 21431313032408.

It is not an unprimeable number, because it can be changed into a prime (21431313032453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257348638 + ... + 2257358131.

It is an arithmetic number, because the mean of its divisors is an integer number (2763000543240).

Almost surely, 2^{21431313032443} is an apocalyptic number.

21431313032443 is a deficient number, since it is larger than the sum of its proper divisors (672691313477).

21431313032443 is a wasteful number, since it uses less digits than its factorization.

21431313032443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514706917.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 21431313032443 its reverse (34423031313412), we get a palindrome (55854344345855).

The spelling of 21431313032443 in words is "twenty-one trillion, four hundred thirty-one billion, three hundred thirteen million, thirty-two thousand, four hundred forty-three".