31730287289000 has 64 divisors (see below), whose sum is σ = 74374082537040. Its totient is φ = 12670711449600.

The previous prime is 31730287288963. The next prime is 31730287289003. The reversal of 31730287289000 is 98278203713.

It can be written as a sum of positive squares in 8 ways, for example, as 8519148262564 + 23211139026436 = 2918758^2 + 4817794^2 .

It is a super-2 number, since 2×31730287289000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 31730287289000.

It is not an unprimeable number, because it can be changed into a prime (31730287289003) 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 15 ways as a sum of consecutive naturals, for example, 26161037 + ... + 27347036.

Almost surely, 2^{31730287289000} is an apocalyptic number.

It is an amenable number.

31730287289000 is an abundant number, since it is smaller than the sum of its proper divisors (42643795248040).

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

31730287289000 is a wasteful number, since it uses less digits than its factorization.

31730287289000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53508687 (or 53508673 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 31730287289000 in words is "thirty-one trillion, seven hundred thirty billion, two hundred eighty-seven million, two hundred eighty-nine thousand".