2218791 has 8 divisors (see below), whose sum is σ = 2965360. Its totient is φ = 1475712.

The previous prime is 2218771. The next prime is 2218807. The reversal of 2218791 is 1978122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2218791 - 2⁷ = 2218663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (370670).

2^2218791 is an apocalyptic number.

2218791 is a deficient number, since it is larger than the sum of its proper divisors (746569).

2218791 is a wasteful number, since it uses less digits than its factorization.

2218791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745.

The product of its digits is 2016, while the sum is 30.

The square root of 2218791 is about 1489.5606734873. The cubic root of 2218791 is about 130.4283895369.

The spelling of 2218791 in words is "two million, two hundred eighteen thousand, seven hundred ninety-one".