212695985 has 4 divisors (see below), whose sum is σ = 255235188. Its totient is φ = 170156784.

The previous prime is 212695969. The next prime is 212695997. The reversal of 212695985 is 589596212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120209296 + 92486689 = 10964^2 + 9617^2 .

It is a cyclic number.

It is not a de Polignac number, because 212695985 - 2⁴ = 212695969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21269594 + ... + 21269603.

It is an arithmetic number, because the mean of its divisors is an integer number (63808797).

Almost surely, 2^212695985 is an apocalyptic number.

It is an amenable number.

212695985 is a deficient number, since it is larger than the sum of its proper divisors (42539203).

212695985 is an equidigital number, since it uses as much as digits as its factorization.

212695985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42539202.

The product of its digits is 388800, while the sum is 47.

The square root of 212695985 is about 14584.1004179209. The cubic root of 212695985 is about 596.9249943413.

The spelling of 212695985 in words is "two hundred twelve million, six hundred ninety-five thousand, nine hundred eighty-five".