2180506 has 12 divisors (see below), whose sum is σ = 3336606. Its totient is φ = 1068720.

The previous prime is 2180501. The next prime is 2180527. The reversal of 2180506 is 6050812.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1229881 + 950625 = 1109^2 + 975^2 .

It is not an unprimeable number, because it can be changed into a prime (2180501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7296 + ... + 7588.

2^2180506 is an apocalyptic number.

2180506 is a deficient number, since it is larger than the sum of its proper divisors (1156100).

2180506 is an equidigital number, since it uses as much as digits as its factorization.

2180506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2180506 is about 1476.6536493030. The cubic root of 2180506 is about 129.6738570155.

The spelling of 2180506 in words is "two million, one hundred eighty thousand, five hundred six".