31143000013000 has 128 divisors (see below), whose sum is σ = 73933417958400. Its totient is φ = 12276362784000.

The previous prime is 31143000012989. The next prime is 31143000013211. The reversal of 31143000013000 is 31000034113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163844017 + ... + 164033983.

It is an arithmetic number, because the mean of its divisors is an integer number (577604827800).

Almost surely, 2^{31143000013000} 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 31143000013000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36966708979200).

31143000013000 is an abundant number, since it is smaller than the sum of its proper divisors (42790417945400).

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

31143000013000 is a wasteful number, since it uses less digits than its factorization.

31143000013000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192368 (or 192354 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31143000013000 its reverse (31000034113), we get a palindrome (31174000047113).

The spelling of 31143000013000 in words is "thirty-one trillion, one hundred forty-three billion, thirteen thousand".