2316681 has 20 divisors (see below), whose sum is σ = 3558852. Its totient is φ = 1500768.

The previous prime is 2316679. The next prime is 2316697. The reversal of 2316681 is 1866132.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 1245456 = 1035^2 + 1116^2 .

It is not a de Polignac number, because 2316681 - 2¹ = 2316679 is a prime.

It is a super-2 number, since 2×2316681² = 10734021711522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2316631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2611 + ... + 3383.

2^2316681 is an apocalyptic number.

It is an amenable number.

2316681 is a deficient number, since it is larger than the sum of its proper divisors (1242171).

2316681 is an equidigital number, since it uses as much as digits as its factorization.

2316681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 813 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2316681 is about 1522.0647161011. The cubic root of 2316681 is about 132.3189600605.

The spelling of 2316681 in words is "two million, three hundred sixteen thousand, six hundred eighty-one".