31000000112 has 20 divisors (see below), whose sum is σ = 60737362560. Its totient is φ = 15325842048.

The previous prime is 31000000067. The next prime is 31000000133. The reversal of 31000000112 is 21100000013.

It is a super-2 number, since 2×31000000112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 31000000112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10883408 + ... + 10886255.

It is an arithmetic number, because the mean of its divisors is an integer number (3036868128).

Almost surely, 2^31000000112 is an apocalyptic number.

It is an amenable number.

31000000112 is a deficient number, since it is larger than the sum of its proper divisors (29737362448).

31000000112 is a wasteful number, since it uses less digits than its factorization.

31000000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21769760 (or 21769754 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 31000000112 its reverse (21100000013), we get a palindrome (52100000125).

Subtracting from 31000000112 its reverse (21100000013), we obtain a palindrome (9900000099).

It can be divided in two parts, 3100000011 and 2, that added together give a palindrome (3100000013).

The spelling of 31000000112 in words is "thirty-one billion, one hundred twelve", and thus it is an aban number.