2171241855 has 40 divisors (see below), whose sum is σ = 3920254800. Its totient is φ = 1149634944.

The previous prime is 2171241851. The next prime is 2171241899. The reversal of 2171241855 is 5581421712.

It is a happy number.

2171241855 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 2171241855 - 2² = 2171241851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171241851) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37011 + ... + 75579.

It is an arithmetic number, because the mean of its divisors is an integer number (98006370).

Almost surely, 2^2171241855 is an apocalyptic number.

2171241855 is a deficient number, since it is larger than the sum of its proper divisors (1749012945).

2171241855 is a wasteful number, since it uses less digits than its factorization.

2171241855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38725 (or 38716 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 2171241855 is about 46596.5863020029. The cubic root of 2171241855 is about 1294.8995126830.

The spelling of 2171241855 in words is "two billion, one hundred seventy-one million, two hundred forty-one thousand, eight hundred fifty-five".