212408985 has 16 divisors (see below), whose sum is σ = 340105536. Its totient is φ = 113201088.

The previous prime is 212408983. The next prime is 212409007. The reversal of 212408985 is 589804212.

It is not a de Polignac number, because 212408985 - 2¹ = 212408983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212408983) 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 15 ways as a sum of consecutive naturals, for example, 19522 + ... + 28388.

It is an arithmetic number, because the mean of its divisors is an integer number (21256596).

Almost surely, 2^212408985 is an apocalyptic number.

It is an amenable number.

212408985 is a deficient number, since it is larger than the sum of its proper divisors (127696551).

212408985 is a wasteful number, since it uses less digits than its factorization.

212408985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 212408985 is about 14574.2576140262. The cubic root of 212408985 is about 596.6563878189.

The spelling of 212408985 in words is "two hundred twelve million, four hundred eight thousand, nine hundred eighty-five".