82122811 has 8 divisors (see below), whose sum is σ = 87311520. Its totient is φ = 77068992.

The previous prime is 82122793. The next prime is 82122847. The reversal of 82122811 is 11822128.

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 82122811 - 2⁵ = 82122779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82122871) 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, 32466 + ... + 34903.

It is an arithmetic number, because the mean of its divisors is an integer number (10913940).

Almost surely, 2^82122811 is an apocalyptic number.

82122811 is a deficient number, since it is larger than the sum of its proper divisors (5188709).

82122811 is a wasteful number, since it uses less digits than its factorization.

82122811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67445.

The product of its digits is 512, while the sum is 25.

The square root of 82122811 is about 9062.1637041051. The cubic root of 82122811 is about 434.6649306793.

Adding to 82122811 its reverse (11822128), we get a palindrome (93944939).

It can be divided in two parts, 821 and 22811, that added together give a palindrome (23632).

The spelling of 82122811 in words is "eighty-two million, one hundred twenty-two thousand, eight hundred eleven".