82213009 has 4 divisors (see below), whose sum is σ = 83253760. Its totient is φ = 81172260.

The previous prime is 82212983. The next prime is 82213039. The reversal of 82213009 is 90031228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82213009 - 2⁷ = 82212881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82213039) 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 3 ways as a sum of consecutive naturals, for example, 520257 + ... + 520414.

It is an arithmetic number, because the mean of its divisors is an integer number (20813440).

Almost surely, 2^82213009 is an apocalyptic number.

It is an amenable number.

82213009 is a deficient number, since it is larger than the sum of its proper divisors (1040751).

82213009 is a wasteful number, since it uses less digits than its factorization.

82213009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040750.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 82213009 is about 9067.1389644143. The cubic root of 82213009 is about 434.8240077251.

It can be divided in two parts, 822 and 13009, that added together give a palindrome (13831).

The spelling of 82213009 in words is "eighty-two million, two hundred thirteen thousand, nine".