13513454144221 has 8 divisors (see below), whose sum is σ = 13885577101440. Its totient is φ = 13143961031712.

The previous prime is 13513454144209. The next prime is 13513454144231. The reversal of 13513454144221 is 12244145431531.

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 13513454144221 - 2¹³ = 13513454136029 is a prime.

It is a super-2 number, since 2×13513454144221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513454144231) 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, 657450760 + ... + 657471313.

It is an arithmetic number, because the mean of its divisors is an integer number (1735697137680).

Almost surely, 2^{13513454144221} is an apocalyptic number.

It is an amenable number.

13513454144221 is a deficient number, since it is larger than the sum of its proper divisors (372122957219).

13513454144221 is a wasteful number, since it uses less digits than its factorization.

13513454144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314922355.

The product of its digits is 230400, while the sum is 40.

Adding to 13513454144221 its reverse (12244145431531), we get a palindrome (25757599575752).

The spelling of 13513454144221 in words is "thirteen trillion, five hundred thirteen billion, four hundred fifty-four million, one hundred forty-four thousand, two hundred twenty-one".