13440143321 has 16 divisors (see below), whose sum is σ = 14805728448. Its totient is φ = 12099067200.

The previous prime is 13440143291. The next prime is 13440143371. The reversal of 13440143321 is 12334104431.

It is a happy number.

It is not a de Polignac number, because 13440143321 - 2⁶ = 13440143257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13440143371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483131 + ... + 510191.

It is an arithmetic number, because the mean of its divisors is an integer number (925358028).

Almost surely, 2^13440143321 is an apocalyptic number.

13440143321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13440143321 is a deficient number, since it is larger than the sum of its proper divisors (1365585127).

13440143321 is a wasteful number, since it uses less digits than its factorization.

13440143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27512.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 13440143321 its reverse (12334104431), we get a palindrome (25774247752).

The spelling of 13440143321 in words is "thirteen billion, four hundred forty million, one hundred forty-three thousand, three hundred twenty-one".