2158206 has 8 divisors (see below), whose sum is σ = 4316424. Its totient is φ = 719400.

The previous prime is 2158183. The next prime is 2158223. The reversal of 2158206 is 6028512.

It is a sphenic number, since it is the product of 3 distinct primes.

2158206 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 179845 + ... + 179856.

It is an arithmetic number, because the mean of its divisors is an integer number (539553).

2^2158206 is an apocalyptic number.

2158206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2158206 is a wasteful number, since it uses less digits than its factorization.

2158206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359706.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2158206 is about 1469.0833876945. The cubic root of 2158206 is about 129.2302839355.

The spelling of 2158206 in words is "two million, one hundred fifty-eight thousand, two hundred six".