82213309 has 8 divisors (see below), whose sum is σ = 87628608. Its totient is φ = 76862400.

The previous prime is 82213267. The next prime is 82213319. The reversal of 82213309 is 90331228.

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 82213309 - 2⁹ = 82212797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82213319) 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 7 ways as a sum of consecutive naturals, for example, 13447 + ... + 18580.

It is an arithmetic number, because the mean of its divisors is an integer number (10953576).

Almost surely, 2^82213309 is an apocalyptic number.

It is an amenable number.

82213309 is a deficient number, since it is larger than the sum of its proper divisors (5415299).

82213309 is a wasteful number, since it uses less digits than its factorization.

82213309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32195.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 82213309 is about 9067.1555076551. The cubic root of 82213309 is about 434.8245366237.

The spelling of 82213309 in words is "eighty-two million, two hundred thirteen thousand, three hundred nine".