31430113540 has 96 divisors (see below), whose sum is σ = 77293117440. Its totient is φ = 10511731584.

The previous prime is 31430113511. The next prime is 31430113541. The reversal of 31430113540 is 4531103413.

It is not an unprimeable number, because it can be changed into a prime (31430113541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2012281 + ... + 2027839.

It is an arithmetic number, because the mean of its divisors is an integer number (805136640).

Almost surely, 2^31430113540 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 31430113540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38646558720).

31430113540 is an abundant number, since it is smaller than the sum of its proper divisors (45863003900).

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

31430113540 is a wasteful number, since it uses less digits than its factorization.

31430113540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15929 (or 15927 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 31430113540 its reverse (4531103413), we get a palindrome (35961216953).

The spelling of 31430113540 in words is "thirty-one billion, four hundred thirty million, one hundred thirteen thousand, five hundred forty".