212541985 has 8 divisors (see below), whose sum is σ = 255168360. Its totient is φ = 169954944.

The previous prime is 212541977. The next prime is 212542021. The reversal of 212541985 is 589145212.

It can be written as a sum of positive squares in 4 ways, for example, as 90859024 + 121682961 = 9532^2 + 11031^2 .

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 212541985 - 2³ = 212541977 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3771 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (31896045).

Almost surely, 2^212541985 is an apocalyptic number.

It is an amenable number.

212541985 is a deficient number, since it is larger than the sum of its proper divisors (42626375).

212541985 is a wasteful number, since it uses less digits than its factorization.

212541985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19667.

The product of its digits is 28800, while the sum is 37.

The square root of 212541985 is about 14578.8197396086. The cubic root of 212541985 is about 596.7808940751.

The spelling of 212541985 in words is "two hundred twelve million, five hundred forty-one thousand, nine hundred eighty-five".