31431144112 has 20 divisors (see below), whose sum is σ = 60939856296. Its totient is φ = 15704729600.

The previous prime is 31431144103. The next prime is 31431144113. The reversal of 31431144112 is 21144113413.

It is not an unprimeable number, because it can be changed into a prime (31431144113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653713 + ... + 700144.

Almost surely, 2^31431144112 is an apocalyptic number.

It is an amenable number.

31431144112 is a deficient number, since it is larger than the sum of its proper divisors (29508712184).

31431144112 is a wasteful number, since it uses less digits than its factorization.

31431144112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355316 (or 1355310 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

Adding to 31431144112 its reverse (21144113413), we get a palindrome (52575257525).

The spelling of 31431144112 in words is "thirty-one billion, four hundred thirty-one million, one hundred forty-four thousand, one hundred twelve".