82218961 has 8 divisors (see below), whose sum is σ = 90027648. Its totient is φ = 74466000.

The previous prime is 82218937. The next prime is 82218977. The reversal of 82218961 is 16981228.

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 82218961 - 2⁹ = 82218449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82218961.

It is not an unprimeable number, because it can be changed into a prime (82218991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10810 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (11253456).

Almost surely, 2^82218961 is an apocalyptic number.

It is an amenable number.

82218961 is a deficient number, since it is larger than the sum of its proper divisors (7808687).

82218961 is a wasteful number, since it uses less digits than its factorization.

82218961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27863.

The product of its digits is 13824, while the sum is 37.

The square root of 82218961 is about 9067.4671766707. The cubic root of 82218961 is about 434.8345008334.

The spelling of 82218961 in words is "eighty-two million, two hundred eighteen thousand, nine hundred sixty-one".