210992 has 10 divisors (see below), whose sum is σ = 408828. Its totient is φ = 105488.

The previous prime is 210967. The next prime is 211007. The reversal of 210992 is 299012.

It is a zygodrome in base 2.

It is an unprimeable number.

210992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6578 + ... + 6609.

2²¹⁰⁹⁹² is an apocalyptic number.

It is an amenable number.

210992 is a deficient number, since it is larger than the sum of its proper divisors (197836).

210992 is a wasteful number, since it uses less digits than its factorization.

210992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195 (or 13189 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 210992 is about 459.3386550248. The cubic root of 210992 is about 59.5326657248.

The spelling of 210992 in words is "two hundred ten thousand, nine hundred ninety-two".