2218491 has 12 divisors (see below), whose sum is σ = 3495960. Its totient is φ = 1344480.

The previous prime is 2218451. The next prime is 2218519. The reversal of 2218491 is 1948122.

It is not a de Polignac number, because 2218491 - 2⁶ = 2218427 is a prime.

2218491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2218451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11106 + ... + 11303.

It is an arithmetic number, because the mean of its divisors is an integer number (291330).

2^2218491 is an apocalyptic number.

2218491 is a deficient number, since it is larger than the sum of its proper divisors (1277469).

2218491 is a wasteful number, since it uses less digits than its factorization.

2218491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22426 (or 22423 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 2218491 is about 1489.4599692506. The cubic root of 2218491 is about 130.4225109179.

The spelling of 2218491 in words is "two million, two hundred eighteen thousand, four hundred ninety-one".