31100320000 has 90 divisors (see below), whose sum is σ = 77574510398. Its totient is φ = 12440064000.

The previous prime is 31100319961. The next prime is 31100320001. The reversal of 31100320000 is 2300113.

It can be written as a sum of positive squares in 5 ways, for example, as 22832418816 + 8267901184 = 151104^2 + 90928^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (31100320001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62812 + ... + 257188.

Almost surely, 2^31100320000 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 31100320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38787255199).

31100320000 is an abundant number, since it is smaller than the sum of its proper divisors (46474190398).

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

31100320000 is an frugal number, since it uses more digits than its factorization.

31100320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194413 (or 194384 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 31100320000 its reverse (2300113), we get a palindrome (31102620113).

The spelling of 31100320000 in words is "thirty-one billion, one hundred million, three hundred twenty thousand".