13531201520 has 20 divisors (see below), whose sum is σ = 31460043720. Its totient is φ = 5412480576.

The previous prime is 13531201417. The next prime is 13531201549. The reversal of 13531201520 is 2510213531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84569930 + ... + 84570089.

It is an arithmetic number, because the mean of its divisors is an integer number (1573002186).

Almost surely, 2^13531201520 is an apocalyptic number.

13531201520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531201520 is an abundant number, since it is smaller than the sum of its proper divisors (17928842200).

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

13531201520 is a wasteful number, since it uses less digits than its factorization.

13531201520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169140032 (or 169140026 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 13531201520 in words is "thirteen billion, five hundred thirty-one million, two hundred one thousand, five hundred twenty".