2219509 has 8 divisors (see below), whose sum is σ = 2277728. Its totient is φ = 2162160.

The previous prime is 2219491. The next prime is 2219513. The reversal of 2219509 is 9059122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2219509 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 (2219209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10414 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (284716).

2^2219509 is an apocalyptic number.

It is an amenable number.

2219509 is a deficient number, since it is larger than the sum of its proper divisors (58219).

2219509 is a wasteful number, since it uses less digits than its factorization.

2219509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2219509 is about 1489.8016646520. The cubic root of 2219509 is about 130.4424568802.

It can be divided in two parts, 221 and 9509, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 2219509 in words is "two million, two hundred nineteen thousand, five hundred nine".