2181833 has 2 divisors, whose sum is σ = 2181834. Its totient is φ = 2181832.

The previous prime is 2181737. The next prime is 2181857. The reversal of 2181833 is 3381812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1923769 + 258064 = 1387^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181833 - 2⁸ = 2181577 is a prime.

It is not a weakly prime, because it can be changed into another prime (2181233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090916 + 1090917.

It is an arithmetic number, because the mean of its divisors is an integer number (1090917).

2^2181833 is an apocalyptic number.

It is an amenable number.

2181833 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181833 is an equidigital number, since it uses as much as digits as its factorization.

2181833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 2181833 is about 1477.1029077217. The cubic root of 2181833 is about 129.7001570750.

The spelling of 2181833 in words is "two million, one hundred eighty-one thousand, eight hundred thirty-three".