13144231522505 has 8 divisors (see below), whose sum is σ = 16316977062600. Its totient is φ = 10152785727616.

The previous prime is 13144231522451. The next prime is 13144231522517. The reversal of 13144231522505 is 50522513244131.

It can be written as a sum of positive squares in 4 ways, for example, as 3144419109001 + 9999812413504 = 1773251^2 + 3162248^2 .

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 13144231522505 - 2⁶ = 13144231522441 is a prime.

It is a super-2 number, since 2×13144231522505² (a number of 27 digits) contains 22 as substring.

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, 45324936140 + ... + 45324936429.

It is an arithmetic number, because the mean of its divisors is an integer number (2039622132825).

Almost surely, 2^{13144231522505} is an apocalyptic number.

It is an amenable number.

13144231522505 is a deficient number, since it is larger than the sum of its proper divisors (3172745540095).

13144231522505 is an equidigital number, since it uses as much as digits as its factorization.

13144231522505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90649872603.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 13144231522505 its reverse (50522513244131), we get a palindrome (63666744766636).

The spelling of 13144231522505 in words is "thirteen trillion, one hundred forty-four billion, two hundred thirty-one million, five hundred twenty-two thousand, five hundred five".