216670216 has 16 divisors (see below), whose sum is σ = 464293440. Its totient is φ = 92858640.

The previous prime is 216670211. The next prime is 216670247. The reversal of 216670216 is 612076612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (216670211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1934500 + ... + 1934611.

It is an arithmetic number, because the mean of its divisors is an integer number (29018340).

Almost surely, 2^216670216 is an apocalyptic number.

It is an amenable number.

216670216 is an abundant number, since it is smaller than the sum of its proper divisors (247623224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216670216 is a wasteful number, since it uses less digits than its factorization.

216670216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869124 (or 3869120 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 216670216 is about 14719.7220082446. The cubic root of 216670216 is about 600.6199296285.

The spelling of 216670216 in words is "two hundred sixteen million, six hundred seventy thousand, two hundred sixteen".