2215409 has 8 divisors (see below), whose sum is σ = 2546688. Its totient is φ = 1887840.

The previous prime is 2215399. The next prime is 2215417. The reversal of 2215409 is 9045122.

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

It is a cyclic number.

It is not a de Polignac number, because 2215409 - 2⁴ = 2215393 is a prime.

It is a d-powerful number, because it can be written as 2 + 2⁷ + 1 + 5⁹ + 4⁹ + 0 + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215469) 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, 509 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (318336).

2^2215409 is an apocalyptic number.

It is an amenable number.

2215409 is a deficient number, since it is larger than the sum of its proper divisors (331279).

2215409 is a wasteful number, since it uses less digits than its factorization.

2215409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2215409 is about 1488.4250065086. The cubic root of 2215409 is about 130.3620871942.

The spelling of 2215409 in words is "two million, two hundred fifteen thousand, four hundred nine".