2272509 has 16 divisors (see below), whose sum is σ = 3565440. Its totient is φ = 1425600.

The previous prime is 2272499. The next prime is 2272513. The reversal of 2272509 is 9052722.

It is a happy number.

It is not a de Polignac number, because 2272509 - 2⁴ = 2272493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2017 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (222840).

2^2272509 is an apocalyptic number.

It is an amenable number.

2272509 is a deficient number, since it is larger than the sum of its proper divisors (1292931).

2272509 is a wasteful number, since it uses less digits than its factorization.

2272509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4977 (or 4971 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2272509 is about 1507.4843282767. The cubic root of 2272509 is about 131.4725855713.

The spelling of 2272509 in words is "two million, two hundred seventy-two thousand, five hundred nine".