2219605 has 8 divisors (see below), whose sum is σ = 2820312. Its totient is φ = 1671168.

The previous prime is 2219563. The next prime is 2219621. The reversal of 2219605 is 5069122.

It can be written as a sum of positive squares in 4 ways, for example, as 576081 + 1643524 = 759^2 + 1282^2 .

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

It is not a de Polignac number, because 2219605 - 2⁹ = 2219093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2219605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12972 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (352539).

2^2219605 is an apocalyptic number.

It is an amenable number.

2219605 is a deficient number, since it is larger than the sum of its proper divisors (600707).

2219605 is a wasteful number, since it uses less digits than its factorization.

2219605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26135.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2219605 is about 1489.8338833575. The cubic root of 2219605 is about 130.4443375207. Note that the first 3 decimals are identical.

The spelling of 2219605 in words is "two million, two hundred nineteen thousand, six hundred five".