2240509 has 4 divisors (see below), whose sum is σ = 2244060. Its totient is φ = 2236960.

The previous prime is 2240507. The next prime is 2240531. The reversal of 2240509 is 9050422.

It is a happy number.

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 1512900 + 727609 = 1230^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240509 - 2¹ = 2240507 is a prime.

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 2240509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240507) 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, 544 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (561015).

2^2240509 is an apocalyptic number.

It is an amenable number.

2240509 is a deficient number, since it is larger than the sum of its proper divisors (3551).

2240509 is an equidigital number, since it uses as much as digits as its factorization.

2240509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2240509 is about 1496.8329900159. The cubic root of 2240509 is about 130.8525622091.

It can be divided in two parts, 22 and 40509, that multiplied together give a palindrome (891198).

The spelling of 2240509 in words is "two million, two hundred forty thousand, five hundred nine".