2271309 has 8 divisors (see below), whose sum is σ = 3132960. Its totient is φ = 1461936.

The previous prime is 2271307. The next prime is 2271337. The reversal of 2271309 is 9031722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2271309 - 2¹ = 2271307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12967 + ... + 13140.

It is an arithmetic number, because the mean of its divisors is an integer number (391620).

2^2271309 is an apocalyptic number.

2271309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2271309 is a deficient number, since it is larger than the sum of its proper divisors (861651).

2271309 is a wasteful number, since it uses less digits than its factorization.

2271309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2271309 is about 1507.0862616320. The cubic root of 2271309 is about 131.4494400992.

The spelling of 2271309 in words is "two million, two hundred seventy-one thousand, three hundred nine".