13521025155 has 64 divisors (see below), whose sum is σ = 23847763968. Its totient is φ = 6487205760.

The previous prime is 13521025139. The next prime is 13521025171. The reversal of 13521025155 is 55152012531.

13521025155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13521025139) and next prime (13521025171).

It is not a de Polignac number, because 13521025155 - 2⁴ = 13521025139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12719154 + ... + 12720216.

It is an arithmetic number, because the mean of its divisors is an integer number (372621312).

Almost surely, 2^13521025155 is an apocalyptic number.

13521025155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13521025155 is a deficient number, since it is larger than the sum of its proper divisors (10326738813).

13521025155 is a wasteful number, since it uses less digits than its factorization.

13521025155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 13521025155 its reverse (55152012531), we get a palindrome (68673037686).

The spelling of 13521025155 in words is "thirteen billion, five hundred twenty-one million, twenty-five thousand, one hundred fifty-five".