211087385 has 8 divisors (see below), whose sum is σ = 268205256. Its totient is φ = 158936320.

The previous prime is 211087379. The next prime is 211087403. The reversal of 211087385 is 583780112.

It can be written as a sum of positive squares in 4 ways, for example, as 90878089 + 120209296 = 9533^2 + 10964^2 .

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

It is not a de Polignac number, because 211087385 - 2⁴ = 211087369 is a prime.

It is a super-2 number, since 2×211087385² = 89115768212276450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241606 + ... + 1241775.

It is an arithmetic number, because the mean of its divisors is an integer number (33525657).

Almost surely, 2^211087385 is an apocalyptic number.

It is an amenable number.

211087385 is a deficient number, since it is larger than the sum of its proper divisors (57117871).

211087385 is a wasteful number, since it uses less digits than its factorization.

211087385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483403.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 211087385 is about 14528.8466507153. The cubic root of 211087385 is about 595.4163552433.

The spelling of 211087385 in words is "two hundred eleven million, eighty-seven thousand, three hundred eighty-five".