2281481 has 2 divisors, whose sum is σ = 2281482. Its totient is φ = 2281480.

The previous prime is 2281429. The next prime is 2281493. The reversal of 2281481 is 1841822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 366025 = 1384^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281481 - 2¹⁸ = 2019337 is a prime.

It is a super-2 number, since 2×2281481² = 10410311106722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₆₈₂₆₃ and since 2281481 and 168263 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2281481.

It is not a weakly prime, because it can be changed into another prime (2281381) 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, 1140740 + 1140741.

It is an arithmetic number, because the mean of its divisors is an integer number (1140741).

2^2281481 is an apocalyptic number.

It is an amenable number.

2281481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281481 is an equidigital number, since it uses as much as digits as its factorization.

2281481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 2281481 is about 1510.4572155477. The cubic root of 2281481 is about 131.6453788867.

The spelling of 2281481 in words is "two million, two hundred eighty-one thousand, four hundred eighty-one".