2271561 has 8 divisors (see below), whose sum is σ = 3099360. Its totient is φ = 1479072.

The previous prime is 2271553. The next prime is 2271569. The reversal of 2271561 is 1651722.

It is an interprime number because it is at equal distance from previous prime (2271553) and next prime (2271569).

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

It is not a de Polignac number, because 2271561 - 2³ = 2271553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2271569) 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, 8676 + ... + 8933.

It is an arithmetic number, because the mean of its divisors is an integer number (387420).

2^2271561 is an apocalyptic number.

It is an amenable number.

2271561 is a deficient number, since it is larger than the sum of its proper divisors (827799).

2271561 is a wasteful number, since it uses less digits than its factorization.

2271561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17655.

The product of its digits is 840, while the sum is 24.

The square root of 2271561 is about 1507.1698643484. The cubic root of 2271561 is about 131.4543013245.

The spelling of 2271561 in words is "two million, two hundred seventy-one thousand, five hundred sixty-one".