2219609 has 4 divisors (see below), whose sum is σ = 2536704. Its totient is φ = 1902516.

The previous prime is 2219563. The next prime is 2219621. The reversal of 2219609 is 9069122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2219609 - 2⁸ = 2219353 is a prime.

It is a super-2 number, since 2×2219609² = 9853328225762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2219629) 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, 158537 + ... + 158550.

It is an arithmetic number, because the mean of its divisors is an integer number (634176).

2^2219609 is an apocalyptic number.

It is an amenable number.

2219609 is a deficient number, since it is larger than the sum of its proper divisors (317095).

2219609 is an equidigital number, since it uses as much as digits as its factorization.

2219609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317094.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2219609 is about 1489.8352257884. The cubic root of 2219609 is about 130.4444158795. Note that the first 4 decimals are identical.

The spelling of 2219609 in words is "two million, two hundred nineteen thousand, six hundred nine".