31143311112 has 64 divisors (see below), whose sum is σ = 78954912000. Its totient is φ = 10235257344.

The previous prime is 31143311053. The next prime is 31143311117. The reversal of 31143311112 is 21111334113.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31143311117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1378564 + ... + 1400972.

It is an arithmetic number, because the mean of its divisors is an integer number (1233670500).

Almost surely, 2^31143311112 is an apocalyptic number.

It is an amenable number.

31143311112 is an abundant number, since it is smaller than the sum of its proper divisors (47811600888).

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

31143311112 is a wasteful number, since it uses less digits than its factorization.

31143311112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23230 (or 23226 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 31143311112 its reverse (21111334113), we get a palindrome (52254645225).

The spelling of 31143311112 in words is "thirty-one billion, one hundred forty-three million, three hundred eleven thousand, one hundred twelve".