2218501 has 4 divisors (see below), whose sum is σ = 2222604. Its totient is φ = 2214400.

The previous prime is 2218451. The next prime is 2218519. The reversal of 2218501 is 1058122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1267876 + 950625 = 1126^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218501 - 2¹³ = 2210309 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 (2218561) 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, 1090 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (555651).

2^2218501 is an apocalyptic number.

It is an amenable number.

2218501 is a deficient number, since it is larger than the sum of its proper divisors (4103).

2218501 is an equidigital number, since it uses as much as digits as its factorization.

2218501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2218501 is about 1489.4633261682. The cubic root of 2218501 is about 130.4227068804.

The spelling of 2218501 in words is "two million, two hundred eighteen thousand, five hundred one".