31443042112 has 112 divisors (see below), whose sum is σ = 65437390080. Its totient is φ = 14978506752.

The previous prime is 31443042109. The next prime is 31443042119. The reversal of 31443042112 is 21124034413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443042119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17935828 + ... + 17937580.

Almost surely, 2^31443042112 is an apocalyptic number.

31443042112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31443042112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32718695040).

31443042112 is an abundant number, since it is smaller than the sum of its proper divisors (33994347968).

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

31443042112 is a wasteful number, since it uses less digits than its factorization.

31443042112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968 (or 1958 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31443042112 its reverse (21124034413), we get a palindrome (52567076525).

The spelling of 31443042112 in words is "thirty-one billion, four hundred forty-three million, forty-two thousand, one hundred twelve".