31444343140 has 96 divisors (see below), whose sum is σ = 76938624000. Its totient is φ = 10572456960.

The previous prime is 31444343123. The next prime is 31444343141. The reversal of 31444343140 is 4134344413.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31444343141) 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 31 ways as a sum of consecutive naturals, for example, 1638400 + ... + 1657480.

It is an arithmetic number, because the mean of its divisors is an integer number (801444000).

Almost surely, 2^31444343140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31444343140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38469312000).

31444343140 is an abundant number, since it is smaller than the sum of its proper divisors (45494280860).

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

31444343140 is a wasteful number, since it uses less digits than its factorization.

31444343140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325 (or 19323 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 31444343140 its reverse (4134344413), we get a palindrome (35578687553).

The spelling of 31444343140 in words is "thirty-one billion, four hundred forty-four million, three hundred forty-three thousand, one hundred forty".