2171505066 has 16 divisors (see below), whose sum is σ = 4343644224. Its totient is φ = 723729344.

The previous prime is 2171505053. The next prime is 2171505097. The reversal of 2171505066 is 6605051712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26146 + ... + 70898.

It is an arithmetic number, because the mean of its divisors is an integer number (271477764).

Almost surely, 2^2171505066 is an apocalyptic number.

2171505066 is an abundant number, since it is smaller than the sum of its proper divisors (2172139158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171505066 is a wasteful number, since it uses less digits than its factorization.

2171505066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52845.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 2171505066 is about 46599.4105756714. The cubic root of 2171505066 is about 1294.9518357384.

Adding to 2171505066 its reverse (6605051712), we get a palindrome (8776556778).

The spelling of 2171505066 in words is "two billion, one hundred seventy-one million, five hundred five thousand, sixty-six".