31000310112 has 96 divisors (see below), whose sum is σ = 82043992800. Its totient is φ = 10248888320.

The previous prime is 31000310059. The next prime is 31000310153. The reversal of 31000310112 is 21101300013.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×31000310112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7654264 + ... + 7658312.

It is an arithmetic number, because the mean of its divisors is an integer number (854624925).

Almost surely, 2^31000310112 is an apocalyptic number.

31000310112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31000310112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41021996400).

31000310112 is an abundant number, since it is smaller than the sum of its proper divisors (51043682688).

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

31000310112 is a wasteful number, since it uses less digits than its factorization.

31000310112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696 (or 4688 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31000310112 its reverse (21101300013), we get a palindrome (52101610125).

The spelling of 31000310112 in words is "thirty-one billion, three hundred ten thousand, one hundred twelve".