210999872 has 28 divisors (see below), whose sum is σ = 420105840. Its totient is φ = 105146496.

The previous prime is 210999847. The next prime is 210999881. The reversal of 210999872 is 278999012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14279 + ... + 25017.

It is an arithmetic number, because the mean of its divisors is an integer number (15003780).

Almost surely, 2^210999872 is an apocalyptic number.

It is an amenable number.

210999872 is a deficient number, since it is larger than the sum of its proper divisors (209105968).

210999872 is a wasteful number, since it uses less digits than its factorization.

210999872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058 (or 11048 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 210999872 is about 14525.8346403916. The cubic root of 210999872 is about 595.3340609303.

The spelling of 210999872 in words is "two hundred ten million, nine hundred ninety-nine thousand, eight hundred seventy-two".