210649216 has 32 divisors (see below), whose sum is σ = 433198080. Its totient is φ = 101925120.

The previous prime is 210649213. The next prime is 210649237. The reversal of 210649216 is 612946012.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (210649211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22576 + ... + 30511.

It is an arithmetic number, because the mean of its divisors is an integer number (13537440).

Almost surely, 2^210649216 is an apocalyptic number.

It is an amenable number.

210649216 is an abundant number, since it is smaller than the sum of its proper divisors (222548864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210649216 is an equidigital number, since it uses as much as digits as its factorization.

210649216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53132 (or 53120 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 210649216 is about 14513.7595405188. The cubic root of 210649216 is about 595.0040872539.

The spelling of 210649216 in words is "two hundred ten million, six hundred forty-nine thousand, two hundred sixteen".