13431213042 has 128 divisors (see below), whose sum is σ = 30512401920. Its totient is φ = 3914127360.

The previous prime is 13431213023. The next prime is 13431213043. The reversal of 13431213042 is 24031213431.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13431213043) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 18474483 + ... + 18475209.

It is an arithmetic number, because the mean of its divisors is an integer number (238378140).

Almost surely, 2^13431213042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13431213042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15256200960).

13431213042 is an abundant number, since it is smaller than the sum of its proper divisors (17081188878).

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

13431213042 is a wasteful number, since it uses less digits than its factorization.

13431213042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 13431213042 its reverse (24031213431), we get a palindrome (37462426473).

The spelling of 13431213042 in words is "thirteen billion, four hundred thirty-one million, two hundred thirteen thousand, forty-two".