31143002000 has 80 divisors (see below), whose sum is σ = 82149634944. Its totient is φ = 11324720000.

The previous prime is 31143001999. The next prime is 31143002003. The reversal of 31143002000 is 20034113.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (31143002003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685796 + ... + 729795.

Almost surely, 2^31143002000 is an apocalyptic number.

It is an amenable number.

31143002000 is an abundant number, since it is smaller than the sum of its proper divisors (51006632944).

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

31143002000 is a wasteful number, since it uses less digits than its factorization.

31143002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415625 (or 1415609 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31143002000 its reverse (20034113), we get a palindrome (31163036113).

The spelling of 31143002000 in words is "thirty-one billion, one hundred forty-three million, two thousand".