13531201540 has 24 divisors (see below), whose sum is σ = 28423442880. Its totient is φ = 5410972128.

The previous prime is 13531201417. The next prime is 13531201549. The reversal of 13531201540 is 4510213531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13531201549) 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 7 ways as a sum of consecutive naturals, for example, 19272 + ... + 165631.

It is an arithmetic number, because the mean of its divisors is an integer number (1184310120).

Almost surely, 2^13531201540 is an apocalyptic number.

13531201540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531201540 is an abundant number, since it is smaller than the sum of its proper divisors (14892241340).

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

13531201540 is a wasteful number, since it uses less digits than its factorization.

13531201540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188571 (or 188569 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 13531201540 in words is "thirteen billion, five hundred thirty-one million, two hundred one thousand, five hundred forty".