13531155520 has 112 divisors (see below), whose sum is σ = 33981298560. Its totient is φ = 5117865984.

The previous prime is 13531155511. The next prime is 13531155529. The reversal of 13531155520 is 2555113531.

It is an interprime number because it is at equal distance from previous prime (13531155511) and next prime (13531155529).

It is not an unprimeable number, because it can be changed into a prime (13531155529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3749557 + ... + 3753163.

Almost surely, 2^13531155520 is an apocalyptic number.

13531155520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13531155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16990649280).

13531155520 is an abundant number, since it is smaller than the sum of its proper divisors (20450143040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531155520 is a wasteful number, since it uses less digits than its factorization.

13531155520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260 (or 4250 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 13531155520 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, five hundred twenty".