2181550005 has 48 divisors (see below), whose sum is σ = 3865470336. Its totient is φ = 1137897600.

The previous prime is 2181549989. The next prime is 2181550061. The reversal of 2181550005 is 5000551812.

2181550005 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 2181550005 - 2⁴ = 2181549989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 374344 + ... + 380126.

It is an arithmetic number, because the mean of its divisors is an integer number (80530632).

Almost surely, 2^2181550005 is an apocalyptic number.

It is an amenable number.

2181550005 is a deficient number, since it is larger than the sum of its proper divisors (1683920331).

2181550005 is a wasteful number, since it uses less digits than its factorization.

2181550005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978 (or 5975 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 2181550005 is about 46707.0659001398. The cubic root of 2181550005 is about 1296.9454923932.

The spelling of 2181550005 in words is "two billion, one hundred eighty-one million, five hundred fifty thousand, five".