31143000112 has 80 divisors (see below), whose sum is σ = 69491584000. Its totient is φ = 13244394240.

The previous prime is 31143000103. The next prime is 31143000121. The reversal of 31143000112 is 21100034113.

It is an interprime number because it is at equal distance from previous prime (31143000103) and next prime (31143000121).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9381589 + ... + 9384907.

It is an arithmetic number, because the mean of its divisors is an integer number (868644800).

Almost surely, 2^31143000112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31143000112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34745792000).

31143000112 is an abundant number, since it is smaller than the sum of its proper divisors (38348583888).

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

31143000112 is a wasteful number, since it uses less digits than its factorization.

31143000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3948 counting only the distinct ones).

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

Adding to 31143000112 its reverse (21100034113), we get a palindrome (52243034225).

The spelling of 31143000112 in words is "thirty-one billion, one hundred forty-three million, one hundred twelve", and thus it is an aban number.