2209481 has 8 divisors (see below), whose sum is σ = 2325000. Its totient is φ = 2096640.

The previous prime is 2209457. The next prime is 2209483. The reversal of 2209481 is 1849022.

2209481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7225 + 2202256 = 85^2 + 1484^2 .

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 2209481 - 2¹⁴ = 2193097 is a prime.

It is a super-2 number, since 2×2209481² = 9763612578722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2209481.

It is not an unprimeable number, because it can be changed into a prime (2209483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (290625).

2^2209481 is an apocalyptic number.

It is an amenable number.

2209481 is a deficient number, since it is larger than the sum of its proper divisors (115519).

2209481 is a wasteful number, since it uses less digits than its factorization.

2209481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2209481 is about 1486.4323058922. The cubic root of 2209481 is about 130.2457088709.

The spelling of 2209481 in words is "two million, two hundred nine thousand, four hundred eighty-one".