7223816421 has 12 divisors (see below), whose sum is σ = 10531920672. Its totient is φ = 4770868776.

The previous prime is 7223816407. The next prime is 7223816423. The reversal of 7223816421 is 1246183227.

It is a happy number.

7223816421 is a `hidden beast` number, since 7 + 2 + 2 + 3 + 8 + 1 + 642 + 1 = 666.

It is not a de Polignac number, because 7223816421 - 2⁵ = 7223816389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7223816423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3749721 + ... + 3751646.

It is an arithmetic number, because the mean of its divisors is an integer number (877660056).

Almost surely, 2^7223816421 is an apocalyptic number.

It is an amenable number.

7223816421 is a deficient number, since it is larger than the sum of its proper divisors (3308104251).

7223816421 is a wasteful number, since it uses less digits than its factorization.

7223816421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7501480 (or 7501477 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 7223816421 is about 84993.0374854317. The cubic root of 7223816421 is about 1933.1055464455.

Adding to 7223816421 its reverse (1246183227), we get a palindrome (8469999648).

The spelling of 7223816421 in words is "seven billion, two hundred twenty-three million, eight hundred sixteen thousand, four hundred twenty-one".