2180321 has 16 divisors (see below), whose sum is σ = 2607360. Its totient is φ = 1797120.

The previous prime is 2180303. The next prime is 2180329. The reversal of 2180321 is 1230812.

It is not a de Polignac number, because 2180321 - 2¹⁰ = 2179297 is a prime.

It is a super-4 number, since 4×2180321⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180321.

It is not an unprimeable number, because it can be changed into a prime (2180329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11201 + ... + 11393.

It is an arithmetic number, because the mean of its divisors is an integer number (162960).

2^2180321 is an apocalyptic number.

It is an amenable number.

2180321 is a deficient number, since it is larger than the sum of its proper divisors (427039).

2180321 is a wasteful number, since it uses less digits than its factorization.

2180321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2180321 is about 1476.5910063386. The cubic root of 2180321 is about 129.6701896187.

The spelling of 2180321 in words is "two million, one hundred eighty thousand, three hundred twenty-one".