2783281 has 2 divisors, whose sum is σ = 2783282. Its totient is φ = 2783280.

The previous prime is 2783267. The next prime is 2783311. The reversal of 2783281 is 1823872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440000 + 1343281 = 1200^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2783281 - 2⁷ = 2783153 is a prime.

It is a super-3 number, since 3×2783281³ = 64683337368883731123, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2783581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391640 + 1391641.

It is an arithmetic number, because the mean of its divisors is an integer number (1391641).

2^2783281 is an apocalyptic number.

It is an amenable number.

2783281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2783281 is an equidigital number, since it uses as much as digits as its factorization.

2783281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 2783281 is about 1668.3168164351. The cubic root of 2783281 is about 140.6648815938.

The spelling of 2783281 in words is "two million, seven hundred eighty-three thousand, two hundred eighty-one".