13531155540 has 48 divisors (see below), whose sum is σ = 43299699072. Its totient is φ = 3092835456.

The previous prime is 13531155529. The next prime is 13531155551. The reversal of 13531155540 is 4555113531.

It is an interprime number because it is at equal distance from previous prime (13531155529) and next prime (13531155551).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16108099 + ... + 16108938.

It is an arithmetic number, because the mean of its divisors is an integer number (902077064).

Almost surely, 2^13531155540 is an apocalyptic number.

13531155540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531155540 is an abundant number, since it is smaller than the sum of its proper divisors (29768543532).

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

13531155540 is a wasteful number, since it uses less digits than its factorization.

13531155540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32217056 (or 32217054 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

It can be divided in two parts, 13531 and 155540, that added together give a triangular number (169071 = T₅₈₁).

The spelling of 13531155540 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, five hundred forty".