83218305 has 8 divisors (see below), whose sum is σ = 133149312. Its totient is φ = 44383088.

The previous prime is 83218283. The next prime is 83218357. The reversal of 83218305 is 50381238.

It is a happy number.

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 83218305 - 2⁹ = 83217793 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2773929 + ... + 2773958.

It is an arithmetic number, because the mean of its divisors is an integer number (16643664).

Almost surely, 2^83218305 is an apocalyptic number.

It is an amenable number.

83218305 is a deficient number, since it is larger than the sum of its proper divisors (49931007).

83218305 is a wasteful number, since it uses less digits than its factorization.

83218305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547895.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 83218305 is about 9122.4067547989. The cubic root of 83218305 is about 436.5891668170.

The spelling of 83218305 in words is "eighty-three million, two hundred eighteen thousand, three hundred five".