82022861 has 4 divisors (see below), whose sum is σ = 82573500. Its totient is φ = 81472224.

The previous prime is 82022851. The next prime is 82022879. The reversal of 82022861 is 16822028.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 60918025 = 4594^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 82022861 - 2¹⁰ = 82021837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82022851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275096 + ... + 275393.

It is an arithmetic number, because the mean of its divisors is an integer number (20643375).

Almost surely, 2^82022861 is an apocalyptic number.

It is an amenable number.

82022861 is a deficient number, since it is larger than the sum of its proper divisors (550639).

82022861 is a wasteful number, since it uses less digits than its factorization.

82022861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550638.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 82022861 is about 9056.6473377293. The cubic root of 82022861 is about 434.4885184805.

Adding to 82022861 its reverse (16822028), we get a palindrome (98844889).

The spelling of 82022861 in words is "eighty-two million, twenty-two thousand, eight hundred sixty-one".