13531201443 has 16 divisors (see below), whose sum is σ = 21101289600. Its totient is φ = 8546021640.

The previous prime is 13531201417. The next prime is 13531201549. The reversal of 13531201443 is 34410213531.

It is a happy number.

13531201443 is a `hidden beast` number, since 13 + 5 + 3 + 1 + 201 + 443 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13531201443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13531201403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13187793 + ... + 13188818.

It is an arithmetic number, because the mean of its divisors is an integer number (1318830600).

Almost surely, 2^13531201443 is an apocalyptic number.

13531201443 is a deficient number, since it is larger than the sum of its proper divisors (7570088157).

13531201443 is a wasteful number, since it uses less digits than its factorization.

13531201443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376639 (or 26376633 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13531201443 its reverse (34410213531), we get a palindrome (47941414974).

The spelling of 13531201443 in words is "thirteen billion, five hundred thirty-one million, two hundred one thousand, four hundred forty-three".