210857085 has 12 divisors (see below), whose sum is σ = 365485692. Its totient is φ = 112457088.

The previous prime is 210857081. The next prime is 210857093. The reversal of 210857085 is 580758012.

210857085 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 570 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 86378436 + 124478649 = 9294^2 + 11157^2 .

It is not a de Polignac number, because 210857085 - 2² = 210857081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210857081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2342812 + ... + 2342901.

It is an arithmetic number, because the mean of its divisors is an integer number (30457141).

Almost surely, 2^210857085 is an apocalyptic number.

It is an amenable number.

210857085 is a deficient number, since it is larger than the sum of its proper divisors (154628607).

210857085 is a wasteful number, since it uses less digits than its factorization.

210857085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685724 (or 4685721 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 210857085 is about 14520.9188758839. The cubic root of 210857085 is about 595.1997399220.

The spelling of 210857085 in words is "two hundred ten million, eight hundred fifty-seven thousand, eighty-five".