2131193547 has 48 divisors (see below), whose sum is σ = 3740525568. Its totient is φ = 1142856000.

The previous prime is 2131193513. The next prime is 2131193587. The reversal of 2131193547 is 7453911312.

2131193547 is a `hidden beast` number, since 2 + 13 + 11 + 93 + 547 = 666.

It is not a de Polignac number, because 2131193547 - 2¹² = 2131189451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131193587) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62922 + ... + 90672.

It is an arithmetic number, because the mean of its divisors is an integer number (77927616).

Almost surely, 2^2131193547 is an apocalyptic number.

2131193547 is a deficient number, since it is larger than the sum of its proper divisors (1609332021).

2131193547 is a wasteful number, since it uses less digits than its factorization.

2131193547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27840 (or 27837 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 2131193547 is about 46164.8518572301. The cubic root of 2131193547 is about 1286.8886311189. Note that the first 3 decimals are identical.

The spelling of 2131193547 in words is "two billion, one hundred thirty-one million, one hundred ninety-three thousand, five hundred forty-seven".