31130000000 has 256 divisors, whose sum is σ = 84866970240. Its totient is φ = 11280000000.

The previous prime is 31129999981. The next prime is 31130000147. The reversal of 31130000000 is 3113.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109999859 + ... + 110000141.

Almost surely, 2^31130000000 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 31130000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42433485120).

31130000000 is an abundant number, since it is smaller than the sum of its proper divisors (53736970240).

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

31130000000 is an frugal number, since it uses more digits than its factorization.

31130000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 8.

Adding to 31130000000 its reverse (3113), we get a palindrome (31130003113).

31130000000 divided by its reverse (3113) gives a 7-th power (10000000 = 10⁷).

It can be divided in two parts, 31 and 130000000, that added together give a palindrome (130000031).

The spelling of 31130000000 in words is "thirty-one billion, one hundred thirty million", and thus it is an aban number.