31040000000 has 208 divisors, whose sum is σ = 78390229008. Its totient is φ = 12288000000.

The previous prime is 31039999993. The next prime is 31040000021. The reversal of 31040000000 is 4013.

It can be written as a sum of positive squares in 8 ways, for example, as 23318511616 + 7721488384 = 152704^2 + 87872^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

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, 319999952 + ... + 320000048.

It is an arithmetic number, because the mean of its divisors is an integer number (376876101).

Almost surely, 2^31040000000 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 31040000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39195114504).

31040000000 is an abundant number, since it is smaller than the sum of its proper divisors (47350229008).

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

31040000000 is an frugal number, since it uses more digits than its factorization.

31040000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

Adding to 31040000000 its reverse (4013), we get a palindrome (31040004013).

The spelling of 31040000000 in words is "thirty-one billion, forty million", and thus it is an aban number and an uban number.