210685145 has 32 divisors (see below), whose sum is σ = 294589440. Its totient is φ = 143136000.

The previous prime is 210685127. The next prime is 210685147. The reversal of 210685145 is 541586012.

It is not a de Polignac number, because 210685145 - 2¹⁰ = 210684121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210685147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47315 + ... + 51575.

It is an arithmetic number, because the mean of its divisors is an integer number (9205920).

Almost surely, 2^210685145 is an apocalyptic number.

It is an amenable number.

210685145 is a deficient number, since it is larger than the sum of its proper divisors (83904295).

210685145 is a wasteful number, since it uses less digits than its factorization.

210685145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 210685145 is about 14514.9972442298. The cubic root of 210685145 is about 595.0379139270.

The spelling of 210685145 in words is "two hundred ten million, six hundred eighty-five thousand, one hundred forty-five".