2271385 has 4 divisors (see below), whose sum is σ = 2725668. Its totient is φ = 1817104.

The previous prime is 2271383. The next prime is 2271391. The reversal of 2271385 is 5831722.

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 1814409 + 456976 = 1347^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 2271385 - 2¹ = 2271383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2271383) 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, 227134 + ... + 227143.

It is an arithmetic number, because the mean of its divisors is an integer number (681417).

2^2271385 is an apocalyptic number.

It is an amenable number.

2271385 is a deficient number, since it is larger than the sum of its proper divisors (454283).

2271385 is an equidigital number, since it uses as much as digits as its factorization.

2271385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454282.

The product of its digits is 3360, while the sum is 28.

The square root of 2271385 is about 1507.1114756381. Note that the first 3 decimals coincide. The cubic root of 2271385 is about 131.4509062209.

The spelling of 2271385 in words is "two million, two hundred seventy-one thousand, three hundred eighty-five".