1331172145613 has 8 divisors (see below), whose sum is σ = 1331727939000. Its totient is φ = 1330616455168.

The previous prime is 1331172145573. The next prime is 1331172145643. The reversal of 1331172145613 is 3165412711331.

It can be written as a sum of positive squares in 4 ways, for example, as 1016301901924 + 314870243689 = 1008118^2 + 561133^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1331172145613 - 2¹² = 1331172141517 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 (1331172145643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35338613 + ... + 35376261.

It is an arithmetic number, because the mean of its divisors is an integer number (166465992375).

Almost surely, 2^{1331172145613} is an apocalyptic number.

It is an amenable number.

1331172145613 is a deficient number, since it is larger than the sum of its proper divisors (555793387).

1331172145613 is a wasteful number, since it uses less digits than its factorization.

1331172145613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51471.

The product of its digits is 45360, while the sum is 38.

Adding to 1331172145613 its reverse (3165412711331), we get a palindrome (4496584856944).

The spelling of 1331172145613 in words is "one trillion, three hundred thirty-one billion, one hundred seventy-two million, one hundred forty-five thousand, six hundred thirteen".