2218647 has 4 divisors (see below), whose sum is σ = 2958200. Its totient is φ = 1479096.

The previous prime is 2218621. The next prime is 2218663. The reversal of 2218647 is 7468122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2218647 - 2⁶ = 2218583 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218607) 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, 369772 + ... + 369777.

It is an arithmetic number, because the mean of its divisors is an integer number (739550).

2^2218647 is an apocalyptic number.

2218647 is a deficient number, since it is larger than the sum of its proper divisors (739553).

2218647 is an equidigital number, since it uses as much as digits as its factorization.

2218647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739552.

The product of its digits is 5376, while the sum is 30.

The square root of 2218647 is about 1489.5123363034. The cubic root of 2218647 is about 130.4255678659.

The spelling of 2218647 in words is "two million, two hundred eighteen thousand, six hundred forty-seven".