82220817 has 8 divisors (see below), whose sum is σ = 125288896. Its totient is φ = 46983312.

The previous prime is 82220797. The next prime is 82220821. The reversal of 82220817 is 71802228.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82220817 - 2⁶ = 82220753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82220317) 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, 1957618 + ... + 1957659.

It is an arithmetic number, because the mean of its divisors is an integer number (15661112).

Almost surely, 2^82220817 is an apocalyptic number.

It is an amenable number.

82220817 is a deficient number, since it is larger than the sum of its proper divisors (43068079).

82220817 is a wasteful number, since it uses less digits than its factorization.

82220817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915287.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 82220817 is about 9067.5695199982. The cubic root of 82220817 is about 434.8377727744.

The spelling of 82220817 in words is "eighty-two million, two hundred twenty thousand, eight hundred seventeen".