82208081 has 8 divisors (see below), whose sum is σ = 82781160. Its totient is φ = 81637632.

The previous prime is 82208057. The next prime is 82208089. The reversal of 82208081 is 18080228.

It can be written as a sum of positive squares in 4 ways, for example, as 10297681 + 71910400 = 3209^2 + 8480^2 .

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 82208081 - 2⁶ = 82208017 is a prime.

It is a super-2 number, since 2×82208081² = 13516337163405122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82208089) 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, 161255 + ... + 161763.

It is an arithmetic number, because the mean of its divisors is an integer number (10347645).

Almost surely, 2^82208081 is an apocalyptic number.

It is an amenable number.

82208081 is a deficient number, since it is larger than the sum of its proper divisors (573079).

82208081 is a wasteful number, since it uses less digits than its factorization.

82208081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 82208081 is about 9066.8672097919. The cubic root of 82208081 is about 434.8153194994.

The spelling of 82208081 in words is "eighty-two million, two hundred eight thousand, eighty-one".