31143538704 has 80 divisors (see below), whose sum is σ = 84933492480. Its totient is φ = 9806359680.

The previous prime is 31143538703. The next prime is 31143538709. The reversal of 31143538704 is 40783534113.

It is not an unprimeable number, because it can be changed into a prime (31143538703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267259 + ... + 365669.

It is an arithmetic number, because the mean of its divisors is an integer number (1061668656).

Almost surely, 2^31143538704 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 31143538704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42466746240).

31143538704 is an abundant number, since it is smaller than the sum of its proper divisors (53789953776).

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

31143538704 is a wasteful number, since it uses less digits than its factorization.

31143538704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98788 (or 98782 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 31143538704 in words is "thirty-one billion, one hundred forty-three million, five hundred thirty-eight thousand, seven hundred four".