13216011547 has 4 divisors (see below), whose sum is σ = 13432667536. Its totient is φ = 12999355560.

The previous prime is 13216011539. The next prime is 13216011551. The reversal of 13216011547 is 74511061231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13216011547 - 2³ = 13216011539 is a prime.

It is a super-2 number, since 2×13216011547² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216011517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108327903 + ... + 108328024.

It is an arithmetic number, because the mean of its divisors is an integer number (3358166884).

Almost surely, 2^13216011547 is an apocalyptic number.

13216011547 is a deficient number, since it is larger than the sum of its proper divisors (216655989).

13216011547 is an equidigital number, since it uses as much as digits as its factorization.

13216011547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216655988.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 13216011547 its reverse (74511061231), we get a palindrome (87727072778).

The spelling of 13216011547 in words is "thirteen billion, two hundred sixteen million, eleven thousand, five hundred forty-seven".