13531112500 has 72 divisors (see below), whose sum is σ = 30553044480. Its totient is φ = 5237700000.

The previous prime is 13531112467. The next prime is 13531112503. The reversal of 13531112500 is 521113531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531112503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370041 + ... + 404959.

It is an arithmetic number, because the mean of its divisors is an integer number (424347840).

Almost surely, 2^13531112500 is an apocalyptic number.

13531112500 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 13531112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15276522240).

13531112500 is an abundant number, since it is smaller than the sum of its proper divisors (17021931980).

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

13531112500 is an equidigital number, since it uses as much as digits as its factorization.

13531112500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34979 (or 34957 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The spelling of 13531112500 in words is "thirteen billion, five hundred thirty-one million, one hundred twelve thousand, five hundred".