2187317 has 6 divisors (see below), whose sum is σ = 2404374. Its totient is φ = 1988360.

The previous prime is 2187301. The next prime is 2187319. The reversal of 2187317 is 7137812.

It can be written as a sum of positive squares in only one way, i.e., 2172676 + 14641 = 1474^2 + 121^2 .

It is not a de Polignac number, because 2187317 - 2⁴ = 2187301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8918 + ... + 9159.

It is an arithmetic number, because the mean of its divisors is an integer number (400729).

2^2187317 is an apocalyptic number.

It is an amenable number.

2187317 is a deficient number, since it is larger than the sum of its proper divisors (217057).

2187317 is a wasteful number, since it uses less digits than its factorization.

2187317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18099 (or 18088 counting only the distinct ones).

The product of its digits is 2352, while the sum is 29.

The square root of 2187317 is about 1478.9580791895. The cubic root of 2187317 is about 129.8087325352.

The spelling of 2187317 in words is "two million, one hundred eighty-seven thousand, three hundred seventeen".