2271999 has 8 divisors (see below), whose sum is σ = 3207600. Its totient is φ = 1425536.

The previous prime is 2271989. The next prime is 2272013. The reversal of 2271999 is 9991722.

It is a happy number.

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 2271999 - 2⁵ = 2271967 is a prime.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271989) 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, 22224 + ... + 22325.

It is an arithmetic number, because the mean of its divisors is an integer number (400950).

2^2271999 is an apocalyptic number.

2271999 is a deficient number, since it is larger than the sum of its proper divisors (935601).

2271999 is a wasteful number, since it uses less digits than its factorization.

2271999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44569.

The product of its digits is 20412, while the sum is 39.

The square root of 2271999 is about 1507.3151627977. The cubic root of 2271999 is about 131.4627497415.

The spelling of 2271999 in words is "two million, two hundred seventy-one thousand, nine hundred ninety-nine".