2209925 has 6 divisors (see below), whose sum is σ = 2740338. Its totient is φ = 1767920.

The previous prime is 2209913. The next prime is 2209931. The reversal of 2209925 is 5299022.

It can be written as a sum of positive squares in 3 ways, for example, as 37249 + 2172676 = 193^2 + 1474^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2209925 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44174 + ... + 44223.

It is an arithmetic number, because the mean of its divisors is an integer number (456723).

2^2209925 is an apocalyptic number.

2209925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2209925 is a deficient number, since it is larger than the sum of its proper divisors (530413).

2209925 is an equidigital number, since it uses as much as digits as its factorization.

2209925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88407 (or 88402 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2209925 is about 1486.5816492881. The cubic root of 2209925 is about 130.2544326725.

The spelling of 2209925 in words is "two million, two hundred nine thousand, nine hundred twenty-five".