2218539 has 4 divisors (see below), whose sum is σ = 2958056. Its totient is φ = 1479024.

The previous prime is 2218523. The next prime is 2218547. The reversal of 2218539 is 9358122.

It is a happy number.

2218539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2218539 - 2⁴ = 2218523 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369754 + ... + 369759.

It is an arithmetic number, because the mean of its divisors is an integer number (739514).

2^2218539 is an apocalyptic number.

2218539 is a deficient number, since it is larger than the sum of its proper divisors (739517).

2218539 is an equidigital number, since it uses as much as digits as its factorization.

2218539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739516.

The product of its digits is 4320, while the sum is 30.

The square root of 2218539 is about 1489.4760823860. The cubic root of 2218539 is about 130.4234515326.

The spelling of 2218539 in words is "two million, two hundred eighteen thousand, five hundred thirty-nine".