3131561730000 has 200 divisors, whose sum is σ = 11028108950496. Its totient is φ = 759166400000.

The previous prime is 3131561729957. The next prime is 3131561730019. The reversal of 3131561730000 is 371651313.

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 (30).

It is a self number, because there is not a number n which added to its sum of digits gives 3131561730000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4414791 + ... + 5074790.

Almost surely, 2^{3131561730000} is an apocalyptic number.

3131561730000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131561730000 is an abundant number, since it is smaller than the sum of its proper divisors (7896547220496).

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

3131561730000 is a wasteful number, since it uses less digits than its factorization.

3131561730000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489623 (or 9489602 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The spelling of 3131561730000 in words is "three trillion, one hundred thirty-one billion, five hundred sixty-one million, seven hundred thirty thousand".