8213533 has 8 divisors (see below), whose sum is σ = 8725752. Its totient is φ = 7704576.

The previous prime is 8213531. The next prime is 8213549. The reversal of 8213533 is 3353128.

It can be written as a sum of positive squares in 4 ways, for example, as 2196324 + 6017209 = 1482^2 + 2453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8213533 - 2¹ = 8213531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8213498 and 8213507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6141 + ... + 7357.

It is an arithmetic number, because the mean of its divisors is an integer number (1090719).

Almost surely, 2^8213533 is an apocalyptic number.

It is an amenable number.

8213533 is a deficient number, since it is larger than the sum of its proper divisors (512219).

8213533 is a wasteful number, since it uses less digits than its factorization.

8213533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631.

The product of its digits is 2160, while the sum is 25.

The square root of 8213533 is about 2865.9262028182. The cubic root of 8213533 is about 201.7638402746.

The spelling of 8213533 in words is "eight million, two hundred thirteen thousand, five hundred thirty-three".