31130323000 has 128 divisors (see below), whose sum is σ = 85188280320. Its totient is φ = 10424937600.

The previous prime is 31130322983. The next prime is 31130323009. The reversal of 31130323000 is 32303113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130323009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249289 + ... + 352711.

It is an arithmetic number, because the mean of its divisors is an integer number (665533440).

Almost surely, 2^31130323000 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 31130323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42594140160).

31130323000 is an abundant number, since it is smaller than the sum of its proper divisors (54057957320).

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

31130323000 is a wasteful number, since it uses less digits than its factorization.

31130323000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103494 (or 103480 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31130323000 its reverse (32303113), we get a palindrome (31162626113).

It can be divided in two parts, 31 and 130323000, that added together give a palindrome (130323031).

The spelling of 31130323000 in words is "thirty-one billion, one hundred thirty million, three hundred twenty-three thousand".