31031012140 has 24 divisors (see below), whose sum is σ = 65168434800. Its totient is φ = 12411774528.

The previous prime is 31031012123. The next prime is 31031012141. The reversal of 31031012140 is 4121013013.

It is not an unprimeable number, because it can be changed into a prime (31031012141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753811 + ... + 793909.

It is an arithmetic number, because the mean of its divisors is an integer number (2715351450).

Almost surely, 2^31031012140 is an apocalyptic number.

It is an amenable number.

31031012140 is an abundant number, since it is smaller than the sum of its proper divisors (34137422660).

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

31031012140 is a wasteful number, since it uses less digits than its factorization.

31031012140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78801 (or 78799 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31031012140 its reverse (4121013013), we get a palindrome (35152025153).

The spelling of 31031012140 in words is "thirty-one billion, thirty-one million, twelve thousand, one hundred forty".