2232721 has 4 divisors (see below), whose sum is σ = 2235712. Its totient is φ = 2229732.

The previous prime is 2232701. The next prime is 2232749. The reversal of 2232721 is 1272322.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2232721 - 2¹¹ = 2230673 is a prime.

It is a super-3 number, since 3×2232721³ = 33390631003626424083, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2232701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676 + ... + 2218.

It is an arithmetic number, because the mean of its divisors is an integer number (558928).

2^2232721 is an apocalyptic number.

It is an amenable number.

2232721 is a deficient number, since it is larger than the sum of its proper divisors (2991).

2232721 is a wasteful number, since it uses less digits than its factorization.

2232721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990.

The product of its digits is 336, while the sum is 19.

The square root of 2232721 is about 1494.2292327484. The cubic root of 2232721 is about 130.7007718774.

The spelling of 2232721 in words is "two million, two hundred thirty-two thousand, seven hundred twenty-one".