31143325000 has 96 divisors (see below), whose sum is σ = 73812853800. Its totient is φ = 12316480000.

The previous prime is 31143324991. The next prime is 31143325001. The reversal of 31143325000 is 52334113.

It can be written as a sum of positive squares in 12 ways, for example, as 19712721604 + 11430603396 = 140402^2 + 106914^2 .

It is not an unprimeable number, because it can be changed into a prime (31143325001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2218002 + ... + 2231998.

Almost surely, 2^31143325000 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 31143325000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36906426900).

31143325000 is an abundant number, since it is smaller than the sum of its proper divisors (42669528800).

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

31143325000 is an equidigital number, since it uses as much as digits as its factorization.

31143325000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14117 (or 14093 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 31143325000 its reverse (52334113), we get a palindrome (31195659113).

The spelling of 31143325000 in words is "thirty-one billion, one hundred forty-three million, three hundred twenty-five thousand".