13444312313 has 4 divisors (see below), whose sum is σ = 13444819968. Its totient is φ = 13443804660.

The previous prime is 13444312307. The next prime is 13444312327. The reversal of 13444312313 is 31321344431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13444312313 - 2²⁰ = 13443263737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13444312513) 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, 211781 + ... + 267842.

It is an arithmetic number, because the mean of its divisors is an integer number (3361204992).

Almost surely, 2^13444312313 is an apocalyptic number.

It is an amenable number.

13444312313 is a deficient number, since it is larger than the sum of its proper divisors (507655).

13444312313 is an equidigital number, since it uses as much as digits as its factorization.

13444312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507654.

The product of its digits is 10368, while the sum is 29.

Adding to 13444312313 its reverse (31321344431), we get a palindrome (44765656744).

The spelling of 13444312313 in words is "thirteen billion, four hundred forty-four million, three hundred twelve thousand, three hundred thirteen".