84218216 has 16 divisors (see below), whose sum is σ = 162177540. Its totient is φ = 40970880.

The previous prime is 84218207. The next prime is 84218243. The reversal of 84218216 is 61281248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 83795716 + 422500 = 9154^2 + 650^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141965 + ... + 142556.

Almost surely, 2^84218216 is an apocalyptic number.

It is an amenable number.

84218216 is a deficient number, since it is larger than the sum of its proper divisors (77959324).

84218216 is a wasteful number, since it uses less digits than its factorization.

84218216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284564 (or 284560 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 84218216 is about 9177.0483272128. The cubic root of 84218216 is about 438.3308246165.

The spelling of 84218216 in words is "eighty-four million, two hundred eighteen thousand, two hundred sixteen".