2171716 has 24 divisors (see below), whose sum is σ = 4074840. Its totient is φ = 1009152.

The previous prime is 2171711. The next prime is 2171717. The reversal of 2171716 is 6171712.

It can be written as a sum of positive squares in 4 ways, for example, as 1368900 + 802816 = 1170^2 + 896^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7266 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (169785).

2^2171716 is an apocalyptic number.

It is an amenable number.

2171716 is a deficient number, since it is larger than the sum of its proper divisors (1903124).

2171716 is a wasteful number, since it uses less digits than its factorization.

2171716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 421 counting only the distinct ones).

The product of its digits is 588, while the sum is 25.

The square root of 2171716 is about 1473.6743195157. The cubic root of 2171716 is about 129.4993763728.

The spelling of 2171716 in words is "two million, one hundred seventy-one thousand, seven hundred sixteen".