211680115 has 8 divisors (see below), whose sum is σ = 254574720. Its totient is φ = 168971712.

The previous prime is 211680103. The next prime is 211680163. The reversal of 211680115 is 511086112.

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 211680115 - 2⁷ = 211679987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211680115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44035 + ... + 48604.

It is an arithmetic number, because the mean of its divisors is an integer number (31821840).

Almost surely, 2^211680115 is an apocalyptic number.

211680115 is a deficient number, since it is larger than the sum of its proper divisors (42894605).

211680115 is an equidigital number, since it uses as much as digits as its factorization.

211680115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93101.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 211680115 is about 14549.2307356781. The cubic root of 211680115 is about 595.9731409529.

The spelling of 211680115 in words is "two hundred eleven million, six hundred eighty thousand, one hundred fifteen".