2180281 has 2 divisors, whose sum is σ = 2180282. Its totient is φ = 2180280.

The previous prime is 2180251. The next prime is 2180293. The reversal of 2180281 is 1820812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 234256 = 1395^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180281 - 2⁹ = 2179769 is a prime.

It is a super-2 number, since 2×2180281² = 9507250477922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2180221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090140 + 1090141.

It is an arithmetic number, because the mean of its divisors is an integer number (1090141).

2^2180281 is an apocalyptic number.

It is an amenable number.

2180281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180281 is an equidigital number, since it uses as much as digits as its factorization.

2180281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2180281 is about 1476.5774615644. The cubic root of 2180281 is about 129.6693966408.

The spelling of 2180281 in words is "two million, one hundred eighty thousand, two hundred eighty-one".