2218461 has 16 divisors (see below), whose sum is σ = 3408000. Its totient is φ = 1257408.

The previous prime is 2218451. The next prime is 2218519. The reversal of 2218461 is 1648122.

It is not a de Polignac number, because 2218461 - 2⁵ = 2218429 is a prime.

It is a Curzon number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2775 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (213000).

2^2218461 is an apocalyptic number.

2218461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2218461 is a deficient number, since it is larger than the sum of its proper divisors (1189539).

2218461 is a wasteful number, since it uses less digits than its factorization.

2218461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 768, while the sum is 24.

The square root of 2218461 is about 1489.4498984524. The cubic root of 2218461 is about 130.4219230269.

The spelling of 2218461 in words is "two million, two hundred eighteen thousand, four hundred sixty-one".