210873213 has 24 divisors (see below), whose sum is σ = 318409728. Its totient is φ = 139454784.

The previous prime is 210873197. The next prime is 210873217. The reversal of 210873213 is 312378012.

It is not a de Polignac number, because 210873213 - 2⁴ = 210873197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210873217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27445 + ... + 34277.

It is an arithmetic number, because the mean of its divisors is an integer number (13267072).

Almost surely, 2^210873213 is an apocalyptic number.

It is an amenable number.

210873213 is a deficient number, since it is larger than the sum of its proper divisors (107536515).

210873213 is an equidigital number, since it uses as much as digits as its factorization.

210873213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6975 (or 6963 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 210873213 is about 14521.4742020223. The cubic root of 210873213 is about 595.2149147131.

The spelling of 210873213 in words is "two hundred ten million, eight hundred seventy-three thousand, two hundred thirteen".