31321030000 has 200 divisors, whose sum is σ = 82146179808. Its totient is φ = 11496576000.

The previous prime is 31321029983. The next prime is 31321030003. The reversal of 31321030000 is 3012313.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321030003) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 25609389 + ... + 25610611.

Almost surely, 2^31321030000 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 31321030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41073089904).

31321030000 is an abundant number, since it is smaller than the sum of its proper divisors (50825149808).

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

31321030000 is a wasteful number, since it uses less digits than its factorization.

31321030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31321030000 its reverse (3012313), we get a palindrome (31324042313).

The spelling of 31321030000 in words is "thirty-one billion, three hundred twenty-one million, thirty thousand".