13231120440432 has 20 divisors (see below), whose sum is σ = 34180394471240. Its totient is φ = 4410373480128.

The previous prime is 13231120440367. The next prime is 13231120440463. The reversal of 13231120440432 is 23404402113231.

It is a super-3 number, since 3×13231120440432³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13231120440432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137824171207 + ... + 137824171302.

It is an arithmetic number, because the mean of its divisors is an integer number (1709019723562).

Almost surely, 2^{13231120440432} is an apocalyptic number.

13231120440432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13231120440432 is an abundant number, since it is smaller than the sum of its proper divisors (20949274030808).

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

13231120440432 is a wasteful number, since it uses less digits than its factorization.

13231120440432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275648342520 (or 275648342514 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 13231120440432 its reverse (23404402113231), we get a palindrome (36635522553663).

The spelling of 13231120440432 in words is "thirteen trillion, two hundred thirty-one billion, one hundred twenty million, four hundred forty thousand, four hundred thirty-two".