31944390530000 has 100 divisors (see below), whose sum is σ = 83289838398228. Its totient is φ = 11794851840000.

The previous prime is 31944390529973. The next prime is 31944390530047. The reversal of 31944390530000 is 3509344913.

It can be written as a sum of positive squares in 10 ways, for example, as 27875907895696 + 4068482634304 = 5279764^2 + 2017048^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a self number, because there is not a number n which added to its sum of digits gives 31944390530000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122733041 + ... + 122993040.

Almost surely, 2^{31944390530000} is an apocalyptic number.

It is an amenable number.

31944390530000 is an abundant number, since it is smaller than the sum of its proper divisors (51345447868228).

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

31944390530000 is a wasteful number, since it uses less digits than its factorization.

31944390530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245726122 (or 245726101 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 41.

Adding to 31944390530000 its reverse (3509344913), we get a palindrome (31947899874913).

The spelling of 31944390530000 in words is "thirty-one trillion, nine hundred forty-four billion, three hundred ninety million, five hundred thirty thousand".