82656321 has 8 divisors (see below), whose sum is σ = 120227424. Its totient is φ = 50094720.

The previous prime is 82656317. The next prime is 82656361. The reversal of 82656321 is 12365628.

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

It is not a de Polignac number, because 82656321 - 2² = 82656317 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2504737 = 82656321 / (8 + 2 + 6 + 5 + 6 + 3 + 2 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82656311) 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, 1252336 + ... + 1252401.

It is an arithmetic number, because the mean of its divisors is an integer number (15028428).

Almost surely, 2^82656321 is an apocalyptic number.

It is an amenable number.

82656321 is a deficient number, since it is larger than the sum of its proper divisors (37571103).

82656321 is a wasteful number, since it uses less digits than its factorization.

82656321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504751.

The product of its digits is 17280, while the sum is 33.

The square root of 82656321 is about 9091.5521777087. The cubic root of 82656321 is about 435.6041651196.

The spelling of 82656321 in words is "eighty-two million, six hundred fifty-six thousand, three hundred twenty-one".