2281009 has 4 divisors (see below), whose sum is σ = 2415204. Its totient is φ = 2146816.

The previous prime is 2281003. The next prime is 2281033. The reversal of 2281009 is 9001822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2002225 + 278784 = 1415^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281009 - 2³ = 2281001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2281001) 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, 67072 + ... + 67105.

It is an arithmetic number, because the mean of its divisors is an integer number (603801).

2^2281009 is an apocalyptic number.

It is an amenable number.

2281009 is a deficient number, since it is larger than the sum of its proper divisors (134195).

2281009 is a wasteful number, since it uses less digits than its factorization.

2281009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134194.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2281009 is about 1510.3009633845. The cubic root of 2281009 is about 131.6362998566.

The spelling of 2281009 in words is "two million, two hundred eighty-one thousand, nine".