2271905 has 8 divisors (see below), whose sum is σ = 2789952. Its totient is φ = 1775088.

The previous prime is 2271901. The next prime is 2271923. The reversal of 2271905 is 5091722.

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

It is a cyclic number.

It is not a de Polignac number, because 2271905 - 2² = 2271901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2271901) 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, 5069 + ... + 5498.

It is an arithmetic number, because the mean of its divisors is an integer number (348744).

2^2271905 is an apocalyptic number.

It is an amenable number.

2271905 is a deficient number, since it is larger than the sum of its proper divisors (518047).

2271905 is a wasteful number, since it uses less digits than its factorization.

2271905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2271905 is about 1507.2839812059. The cubic root of 2271905 is about 131.4609367024.

The spelling of 2271905 in words is "two million, two hundred seventy-one thousand, nine hundred five".