2043538191 has 12 divisors (see below), whose sum is σ = 2964131040. Its totient is φ = 1356657120.

The previous prime is 2043538187. The next prime is 2043538229. The reversal of 2043538191 is 1918353402.

2043538191 is a `hidden beast` number, since 2 + 0 + 435 + 38 + 191 = 666.

It is not a de Polignac number, because 2043538191 - 2² = 2043538187 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043538181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472870 + ... + 477171.

It is an arithmetic number, because the mean of its divisors is an integer number (247010920).

Almost surely, 2^2043538191 is an apocalyptic number.

2043538191 is a deficient number, since it is larger than the sum of its proper divisors (920592849).

2043538191 is a wasteful number, since it uses less digits than its factorization.

2043538191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950286 (or 950283 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2043538191 is about 45205.5106264712. The cubic root of 2043538191 is about 1268.9979470409.

The spelling of 2043538191 in words is "two billion, forty-three million, five hundred thirty-eight thousand, one hundred ninety-one".