31132445200000 has 192 divisors, whose sum is σ = 77697559225440. Its totient is φ = 12424796800000.

The previous prime is 31132445199991. The next prime is 31132445200093. The reversal of 31132445200000 is 254423113.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177112155 + ... + 177287845.

Almost surely, 2^{31132445200000} 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 31132445200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38848779612720).

31132445200000 is an abundant number, since it is smaller than the sum of its proper divisors (46565114025440).

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

31132445200000 is an frugal number, since it uses more digits than its factorization.

31132445200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176173 (or 176141 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31132445200000 its reverse (254423113), we get a palindrome (31132699623113).

The spelling of 31132445200000 in words is "thirty-one trillion, one hundred thirty-two billion, four hundred forty-five million, two hundred thousand".