2180239 has 4 divisors (see below), whose sum is σ = 2275056. Its totient is φ = 2085424.

The previous prime is 2180221. The next prime is 2180251. The reversal of 2180239 is 9320812.

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 2180239 - 2⁷ = 2180111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180219) 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, 47374 + ... + 47419.

It is an arithmetic number, because the mean of its divisors is an integer number (568764).

2^2180239 is an apocalyptic number.

2180239 is a deficient number, since it is larger than the sum of its proper divisors (94817).

2180239 is an equidigital number, since it uses as much as digits as its factorization.

2180239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94816.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2180239 is about 1476.5632394178. The cubic root of 2180239 is about 129.6685640035.

The spelling of 2180239 in words is "two million, one hundred eighty thousand, two hundred thirty-nine".