31200031104 has 128 divisors (see below), whose sum is σ = 90517150080. Its totient is φ = 9443266560.

The previous prime is 31200031097. The next prime is 31200031237. The reversal of 31200031104 is 40113000213.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 3953947 + ... + 3961829.

It is an arithmetic number, because the mean of its divisors is an integer number (707165235).

Almost surely, 2^31200031104 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 31200031104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45258575040).

31200031104 is an abundant number, since it is smaller than the sum of its proper divisors (59317118976).

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

31200031104 is a wasteful number, since it uses less digits than its factorization.

31200031104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8848 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31200031104 its reverse (40113000213), we get a palindrome (71313031317).

The spelling of 31200031104 in words is "thirty-one billion, two hundred million, thirty-one thousand, one hundred four".