3221723 has 4 divisors (see below), whose sum is σ = 3225768. Its totient is φ = 3217680.

The previous prime is 3221719. The next prime is 3221731. The reversal of 3221723 is 3271223.

3221723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, 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 3221723 - 2² = 3221719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221695 and 3221704.

It is not an unprimeable number, because it can be changed into a prime (3221753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386 + ... + 2567.

It is an arithmetic number, because the mean of its divisors is an integer number (806442).

Almost surely, 2^3221723 is an apocalyptic number.

3221723 is a deficient number, since it is larger than the sum of its proper divisors (4045).

3221723 is a wasteful number, since it uses less digits than its factorization.

3221723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044.

The product of its digits is 504, while the sum is 20.

The square root of 3221723 is about 1794.9158754660. The cubic root of 3221723 is about 147.6939591426.

Adding to 3221723 its reverse (3271223), we get a palindrome (6492946).

The spelling of 3221723 in words is "three million, two hundred twenty-one thousand, seven hundred twenty-three".