2184542991 has 12 divisors (see below), whose sum is σ = 3158059632. Its totient is φ = 1455158016.

The previous prime is 2184542977. The next prime is 2184543019. The reversal of 2184542991 is 1992454812.

It is a happy number.

2184542991 is a `hidden beast` number, since 2 + 18 + 4 + 542 + 9 + 91 = 666.

2184542991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2184542991 - 2¹⁷ = 2184411919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2184542951) 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, 88771 + ... + 110676.

It is an arithmetic number, because the mean of its divisors is an integer number (263171636).

Almost surely, 2^2184542991 is an apocalyptic number.

2184542991 is a deficient number, since it is larger than the sum of its proper divisors (973516641).

2184542991 is a wasteful number, since it uses less digits than its factorization.

2184542991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200670 (or 200667 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2184542991 is about 46739.0948885406. The cubic root of 2184542991 is about 1297.5383378250.

It can be divided in two parts, 218454 and 2991, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 2184542991 in words is "two billion, one hundred eighty-four million, five hundred forty-two thousand, nine hundred ninety-one".