2209813 has 8 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 2030784.

The previous prime is 2209811. The next prime is 2209841. The reversal of 2209813 is 3189022.

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 2209813 - 2¹ = 2209811 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 (2209811) 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, 781 + ... + 2242.

It is an arithmetic number, because the mean of its divisors is an integer number (299376).

2^2209813 is an apocalyptic number.

It is an amenable number.

2209813 is a deficient number, since it is larger than the sum of its proper divisors (185195).

2209813 is a wasteful number, since it uses less digits than its factorization.

2209813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2209813 is about 1486.5439784951. The cubic root of 2209813 is about 130.2522321841.

The spelling of 2209813 in words is "two million, two hundred nine thousand, eight hundred thirteen".