13531144340 has 48 divisors (see below), whose sum is σ = 32585680512. Its totient is φ = 4623401856.

The previous prime is 13531144321. The next prime is 13531144369. The reversal of 13531144340 is 4344113531.

It is a happy number.

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, 123914 + ... + 205953.

It is an arithmetic number, because the mean of its divisors is an integer number (678868344).

Almost surely, 2^13531144340 is an apocalyptic number.

13531144340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531144340 is an abundant number, since it is smaller than the sum of its proper divisors (19054536172).

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

13531144340 is a wasteful number, since it uses less digits than its factorization.

13531144340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330176 (or 330174 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 13531144340 its reverse (4344113531), we get a palindrome (17875257871).

The spelling of 13531144340 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-four thousand, three hundred forty".