2271921 has 4 divisors (see below), whose sum is σ = 3029232. Its totient is φ = 1514612.

The previous prime is 2271901. The next prime is 2271923. The reversal of 2271921 is 1291722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2271921 - 2¹⁰ = 2270897 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2271891 and 2271900.

It is not an unprimeable number, because it can be changed into a prime (2271923) 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, 378651 + ... + 378656.

It is an arithmetic number, because the mean of its divisors is an integer number (757308).

2^2271921 is an apocalyptic number.

It is an amenable number.

2271921 is a deficient number, since it is larger than the sum of its proper divisors (757311).

2271921 is an equidigital number, since it uses as much as digits as its factorization.

2271921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757310.

The product of its digits is 504, while the sum is 24.

The square root of 2271921 is about 1507.2892887565. The cubic root of 2271921 is about 131.4612453083.

The spelling of 2271921 in words is "two million, two hundred seventy-one thousand, nine hundred twenty-one".