31430112140 has 96 divisors (see below), whose sum is σ = 78234576000. Its totient is φ = 10599240960.

The previous prime is 31430112139. The next prime is 31430112143. The reversal of 31430112140 is 4121103413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31430112143) 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, 380906 + ... + 456014.

It is an arithmetic number, because the mean of its divisors is an integer number (814943500).

Almost surely, 2^31430112140 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 31430112140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39117288000).

31430112140 is an abundant number, since it is smaller than the sum of its proper divisors (46804463860).

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

31430112140 is a wasteful number, since it uses less digits than its factorization.

31430112140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75200 (or 75184 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31430112140 its reverse (4121103413), we get a palindrome (35551215553).

The spelling of 31430112140 in words is "thirty-one billion, four hundred thirty million, one hundred twelve thousand, one hundred forty".