13440343111 has 4 divisors (see below), whose sum is σ = 14474215672. Its totient is φ = 12406470552.

The previous prime is 13440343079. The next prime is 13440343141. The reversal of 13440343111 is 11134304431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11134304431 = 13591 ⋅819241.

It is a cyclic number.

It is not a de Polignac number, because 13440343111 - 2⁵ = 13440343079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440343141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516936261 + ... + 516936286.

It is an arithmetic number, because the mean of its divisors is an integer number (3618553918).

Almost surely, 2^13440343111 is an apocalyptic number.

13440343111 is a deficient number, since it is larger than the sum of its proper divisors (1033872561).

13440343111 is a wasteful number, since it uses less digits than its factorization.

13440343111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033872560.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 13440343111 its reverse (11134304431), we get a palindrome (24574647542).

The spelling of 13440343111 in words is "thirteen billion, four hundred forty million, three hundred forty-three thousand, one hundred eleven".