216670215 has 16 divisors (see below), whose sum is σ = 347308128. Its totient is φ = 115345536.

The previous prime is 216670211. The next prime is 216670247. The reversal of 216670215 is 512076612.

It is not a de Polignac number, because 216670215 - 2² = 216670211 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4612 + ... + 21321.

It is an arithmetic number, because the mean of its divisors is an integer number (21706758).

Almost surely, 2^216670215 is an apocalyptic number.

216670215 is a deficient number, since it is larger than the sum of its proper divisors (130637913).

216670215 is a wasteful number, since it uses less digits than its factorization.

216670215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26498.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 216670215 is about 14719.7219742766. The cubic root of 216670215 is about 600.6199287045.

The spelling of 216670215 in words is "two hundred sixteen million, six hundred seventy thousand, two hundred fifteen".