2118317 has 4 divisors (see below), whose sum is σ = 2121600. Its totient is φ = 2115036.

The previous prime is 2118313. The next prime is 2118331. The reversal of 2118317 is 7138112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2118317 - 2² = 2118313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2118292 and 2118301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (530400).

2^2118317 is an apocalyptic number.

It is an amenable number.

2118317 is a deficient number, since it is larger than the sum of its proper divisors (3283).

2118317 is an equidigital number, since it uses as much as digits as its factorization.

2118317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282.

The product of its digits is 336, while the sum is 23.

The square root of 2118317 is about 1455.4439185348. The cubic root of 2118317 is about 128.4291625094.

The spelling of 2118317 in words is "two million, one hundred eighteen thousand, three hundred seventeen".