211980985 has 8 divisors (see below), whose sum is σ = 254457216. Its totient is φ = 169531440.

The previous prime is 211980983. The next prime is 211980991. The reversal of 211980985 is 589089112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211980985 - 2¹ = 211980983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211980983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22080 + ... + 30190.

It is an arithmetic number, because the mean of its divisors is an integer number (31807152).

Almost surely, 2^211980985 is an apocalyptic number.

It is an amenable number.

211980985 is a deficient number, since it is larger than the sum of its proper divisors (42476231).

211980985 is an equidigital number, since it uses as much as digits as its factorization.

211980985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13343.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 211980985 is about 14559.5667861376. The cubic root of 211980985 is about 596.2553679853.

The spelling of 211980985 in words is "two hundred eleven million, nine hundred eighty thousand, nine hundred eighty-five".