2281909 has 4 divisors (see below), whose sum is σ = 2607904. Its totient is φ = 1955916.

The previous prime is 2281891. The next prime is 2281913. The reversal of 2281909 is 9091822.

2281909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9091822 = 2 ⋅4545911.

It is a cyclic number.

It is not a de Polignac number, because 2281909 - 2⁷ = 2281781 is a prime.

It is a Duffinian number.

2281909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281109) 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 3 ways as a sum of consecutive naturals, for example, 162987 + ... + 163000.

It is an arithmetic number, because the mean of its divisors is an integer number (651976).

2^2281909 is an apocalyptic number.

It is an amenable number.

2281909 is a deficient number, since it is larger than the sum of its proper divisors (325995).

2281909 is an equidigital number, since it uses as much as digits as its factorization.

2281909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325994.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2281909 is about 1510.5988878587. The cubic root of 2281909 is about 131.6536104841.

The spelling of 2281909 in words is "two million, two hundred eighty-one thousand, nine hundred nine".