2180243 has 4 divisors (see below), whose sum is σ = 2347968. Its totient is φ = 2012520.

The previous prime is 2180221. The next prime is 2180251. The reversal of 2180243 is 3420812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2180243 - 2⁶ = 2180179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180293) 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, 83843 + ... + 83868.

It is an arithmetic number, because the mean of its divisors is an integer number (586992).

2^2180243 is an apocalyptic number.

2180243 is a deficient number, since it is larger than the sum of its proper divisors (167725).

2180243 is a wasteful number, since it uses less digits than its factorization.

2180243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167724.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2180243 is about 1476.5645939139. The cubic root of 2180243 is about 129.6686433028.

The spelling of 2180243 in words is "two million, one hundred eighty thousand, two hundred forty-three".