13224313451665 has 8 divisors (see below), whose sum is σ = 15892755902568. Its totient is φ = 10563730920960.

The previous prime is 13224313451647. The next prime is 13224313451719. The reversal of 13224313451665 is 56615431342231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15944365441 + 13208369086224 = 126271^2 + 3634332^2 .

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

It is not a de Polignac number, because 13224313451665 - 2¹¹ = 13224313449617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964976346 + ... + 1964983075.

It is an arithmetic number, because the mean of its divisors is an integer number (1986594487821).

Almost surely, 2^{13224313451665} is an apocalyptic number.

It is an amenable number.

13224313451665 is a deficient number, since it is larger than the sum of its proper divisors (2668442450903).

13224313451665 is an equidigital number, since it uses as much as digits as its factorization.

13224313451665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929960099.

The product of its digits is 1555200, while the sum is 46.

Adding to 13224313451665 its reverse (56615431342231), we get a palindrome (69839744793896).

The spelling of 13224313451665 in words is "thirteen trillion, two hundred twenty-four billion, three hundred thirteen million, four hundred fifty-one thousand, six hundred sixty-five".