2131812907308 has 480 divisors, whose sum is σ = 6915032678400. Its totient is φ = 559113093504.

The previous prime is 2131812907291. The next prime is 2131812907313. The reversal of 2131812907308 is 8037092181312.

2131812907308 is a `hidden beast` number, since 2 + 1 + 318 + 1 + 29 + 0 + 7 + 308 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 235320883 + ... + 235329941.

It is an arithmetic number, because the mean of its divisors is an integer number (14406318080).

Almost surely, 2^{2131812907308} is an apocalyptic number.

2131812907308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131812907308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3457516339200).

2131812907308 is an abundant number, since it is smaller than the sum of its proper divisors (4783219771092).

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

2131812907308 is a wasteful number, since it uses less digits than its factorization.

2131812907308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271 (or 9260 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 2131812907308 in words is "two trillion, one hundred thirty-one billion, eight hundred twelve million, nine hundred seven thousand, three hundred eight".