13521455155 has 16 divisors (see below), whose sum is σ = 18501757344. Its totient is φ = 9397716480.

The previous prime is 13521455153. The next prime is 13521455173. The reversal of 13521455155 is 55155412531.

It is not a de Polignac number, because 13521455155 - 2¹ = 13521455153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521455153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6117201 + ... + 6119410.

It is an arithmetic number, because the mean of its divisors is an integer number (1156359834).

Almost surely, 2^13521455155 is an apocalyptic number.

13521455155 is a deficient number, since it is larger than the sum of its proper divisors (4980302189).

13521455155 is a wasteful number, since it uses less digits than its factorization.

13521455155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12236646.

The product of its digits is 75000, while the sum is 37.

Adding to 13521455155 its reverse (55155412531), we get a palindrome (68676867686).

The spelling of 13521455155 in words is "thirteen billion, five hundred twenty-one million, four hundred fifty-five thousand, one hundred fifty-five".