2131555443 has 16 divisors (see below), whose sum is σ = 2940979200. Its totient is φ = 1371810240.

The previous prime is 2131555423. The next prime is 2131555471. The reversal of 2131555443 is 3445551312.

It is not a de Polignac number, because 2131555443 - 2⁶ = 2131555379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131555423) 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, 10018 + ... + 66056.

It is an arithmetic number, because the mean of its divisors is an integer number (183811200).

Almost surely, 2^2131555443 is an apocalyptic number.

2131555443 is a deficient number, since it is larger than the sum of its proper divisors (809423757).

2131555443 is a wasteful number, since it uses less digits than its factorization.

2131555443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56482.

The product of its digits is 36000, while the sum is 33.

The square root of 2131555443 is about 46168.7712961911. The cubic root of 2131555443 is about 1286.9614687846.

The spelling of 2131555443 in words is "two billion, one hundred thirty-one million, five hundred fifty-five thousand, four hundred forty-three".