2143580945931 has 24 divisors (see below), whose sum is σ = 3176514156816. Its totient is φ = 1392496185600.

The previous prime is 2143580945929. The next prime is 2143580945963. The reversal of 2143580945931 is 1395490853412.

2143580945931 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 580 + 9 + 4 + 59 + 3 + 1 = 666.

It is not a de Polignac number, because 2143580945931 - 2¹ = 2143580945929 is a prime.

It is a super-4 number, since 4×2143580945931⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2143580945921) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19600170 + ... + 19709231.

It is an arithmetic number, because the mean of its divisors is an integer number (132354756534).

Almost surely, 2^{2143580945931} is an apocalyptic number.

2143580945931 is a deficient number, since it is larger than the sum of its proper divisors (1032933210885).

2143580945931 is a wasteful number, since it uses less digits than its factorization.

2143580945931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39309563 (or 39309560 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 2143580945931 in words is "two trillion, one hundred forty-three billion, five hundred eighty million, nine hundred forty-five thousand, nine hundred thirty-one".