2171129706 has 24 divisors (see below), whose sum is σ = 4706678340. Its totient is φ = 723315456.

The previous prime is 2171129693. The next prime is 2171129773. The reversal of 2171129706 is 6079211712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1997285481 + 173844225 = 44691^2 + 13185^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2076 + ... + 65928.

Almost surely, 2^2171129706 is an apocalyptic number.

2171129706 is an abundant number, since it is smaller than the sum of its proper divisors (2535548634).

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

2171129706 is a wasteful number, since it uses less digits than its factorization.

2171129706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65750 (or 65747 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 2171129706 is about 46595.3828828565. The cubic root of 2171129706 is about 1294.8772175794.

The spelling of 2171129706 in words is "two billion, one hundred seventy-one million, one hundred twenty-nine thousand, seven hundred six".