13444431211 has 4 divisors (see below), whose sum is σ = 13444678800. Its totient is φ = 13444183624.

The previous prime is 13444431197. The next prime is 13444431229. The reversal of 13444431211 is 11213444431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11213444431 = 7 ⋅1601920633.

It is a cyclic number.

It is not a de Polignac number, because 13444431211 - 2¹⁷ = 13444300139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13444431211.

It is not an unprimeable number, because it can be changed into a prime (13444431271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3151 + ... + 164008.

It is an arithmetic number, because the mean of its divisors is an integer number (3361169700).

Almost surely, 2^13444431211 is an apocalyptic number.

13444431211 is a deficient number, since it is larger than the sum of its proper divisors (247589).

13444431211 is an equidigital number, since it uses as much as digits as its factorization.

13444431211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247588.

The product of its digits is 4608, while the sum is 28.

Adding to 13444431211 its reverse (11213444431), we get a palindrome (24657875642).

The spelling of 13444431211 in words is "thirteen billion, four hundred forty-four million, four hundred thirty-one thousand, two hundred eleven".