7216823 has 4 divisors (see below), whose sum is σ = 7641360. Its totient is φ = 6792288.

The previous prime is 7216801. The next prime is 7216837. The reversal of 7216823 is 3286127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3286127 = 13 ⋅252779.

It is a cyclic number.

It is not a de Polignac number, because 7216823 - 2⁸ = 7216567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216423) 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, 212243 + ... + 212276.

It is an arithmetic number, because the mean of its divisors is an integer number (1910340).

Almost surely, 2^7216823 is an apocalyptic number.

7216823 is a deficient number, since it is larger than the sum of its proper divisors (424537).

7216823 is a wasteful number, since it uses less digits than its factorization.

7216823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424536.

The product of its digits is 4032, while the sum is 29.

The square root of 7216823 is about 2686.4145249756. The cubic root of 7216823 is about 193.2481527917.

The spelling of 7216823 in words is "seven million, two hundred sixteen thousand, eight hundred twenty-three".