210995982 has 64 divisors (see below), whose sum is σ = 486942720. Its totient is φ = 67651200.

The previous prime is 210995947. The next prime is 210996001. The reversal of 210995982 is 289599012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403173 + ... + 403695.

It is an arithmetic number, because the mean of its divisors is an integer number (7608480).

Almost surely, 2^210995982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210995982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243471360).

210995982 is an abundant number, since it is smaller than the sum of its proper divisors (275946738).

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

210995982 is a wasteful number, since it uses less digits than its factorization.

210995982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 210995982 is about 14525.7007404118. The cubic root of 210995982 is about 595.3304023756.

The spelling of 210995982 in words is "two hundred ten million, nine hundred ninety-five thousand, nine hundred eighty-two".