8221523 has 4 divisors (see below), whose sum is σ = 8705160. Its totient is φ = 7737888.

The previous prime is 8221513. The next prime is 8221537. The reversal of 8221523 is 3251228.

8221523 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 8221523 - 2⁸ = 8221267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221513) 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, 241793 + ... + 241826.

It is an arithmetic number, because the mean of its divisors is an integer number (2176290).

Almost surely, 2^8221523 is an apocalyptic number.

8221523 is a deficient number, since it is larger than the sum of its proper divisors (483637).

8221523 is a wasteful number, since it uses less digits than its factorization.

8221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483636.

The product of its digits is 960, while the sum is 23.

The square root of 8221523 is about 2867.3198286902. The cubic root of 8221523 is about 201.8292433367.

The spelling of 8221523 in words is "eight million, two hundred twenty-one thousand, five hundred twenty-three".