13131231240344 has 32 divisors (see below), whose sum is σ = 28146992395680. Its totient is φ = 5625942584064.

The previous prime is 13131231240313. The next prime is 13131231240349. The reversal of 13131231240344 is 44304213213131.

It is a self number, because there is not a number n which added to its sum of digits gives 13131231240344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131231240349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35814887 + ... + 36179670.

It is an arithmetic number, because the mean of its divisors is an integer number (879593512365).

Almost surely, 2^{13131231240344} is an apocalyptic number.

13131231240344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13131231240344 is an abundant number, since it is smaller than the sum of its proper divisors (15015761155336).

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

13131231240344 is a wasteful number, since it uses less digits than its factorization.

13131231240344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71997827 (or 71997823 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 13131231240344 its reverse (44304213213131), we get a palindrome (57435444453475).

The spelling of 13131231240344 in words is "thirteen trillion, one hundred thirty-one billion, two hundred thirty-one million, two hundred forty thousand, three hundred forty-four".