82090211 has 4 divisors (see below), whose sum is σ = 93817392. Its totient is φ = 70363032.

The previous prime is 82090207. The next prime is 82090219. The reversal of 82090211 is 11209028.

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 82090211 - 2² = 82090207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82090219) 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, 5863580 + ... + 5863593.

It is an arithmetic number, because the mean of its divisors is an integer number (23454348).

Almost surely, 2^82090211 is an apocalyptic number.

82090211 is a deficient number, since it is larger than the sum of its proper divisors (11727181).

82090211 is a wasteful number, since it uses less digits than its factorization.

82090211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11727180.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 82090211 is about 9060.3648381288. The cubic root of 82090211 is about 434.6074072702.

Adding to 82090211 its reverse (11209028), we get a palindrome (93299239).

The spelling of 82090211 in words is "eighty-two million, ninety thousand, two hundred eleven".