8221803 has 4 divisors (see below), whose sum is σ = 10962408. Its totient is φ = 5481200.

The previous prime is 8221793. The next prime is 8221823. The reversal of 8221803 is 3081228.

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 8221803 - 2⁶ = 8221739 is a prime.

It is a super-3 number, since 3×8221803³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

8221803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8221823) 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, 1370298 + ... + 1370303.

It is an arithmetic number, because the mean of its divisors is an integer number (2740602).

Almost surely, 2^8221803 is an apocalyptic number.

8221803 is a deficient number, since it is larger than the sum of its proper divisors (2740605).

8221803 is a wasteful number, since it uses less digits than its factorization.

8221803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740604.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8221803 is about 2867.3686543589. The cubic root of 8221803 is about 201.8315345402.

The spelling of 8221803 in words is "eight million, two hundred twenty-one thousand, eight hundred three".