2133281 has 2 divisors, whose sum is σ = 2133282. Its totient is φ = 2133280.

The previous prime is 2133277. The next prime is 2133289. The reversal of 2133281 is 1823312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 1681 = 1460^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133281 - 2² = 2133277 is a prime.

It is a super-2 number, since 2×2133281² = 9101775649922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2133289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066640 + 1066641.

It is an arithmetic number, because the mean of its divisors is an integer number (1066641).

2^2133281 is an apocalyptic number.

It is an amenable number.

2133281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133281 is an equidigital number, since it uses as much as digits as its factorization.

2133281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2133281 is about 1460.5755714786. The cubic root of 2133281 is about 128.7308652872.

Adding to 2133281 its reverse (1823312), we get a palindrome (3956593).

The spelling of 2133281 in words is "two million, one hundred thirty-three thousand, two hundred eighty-one".