240082781 has 2 divisors, whose sum is σ = 240082782. Its totient is φ = 240082780.

The previous prime is 240082771. The next prime is 240082811. The reversal of 240082781 is 187280042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217090756 + 22992025 = 14734^2 + 4795^2 .

It is a cyclic number.

It is not a de Polignac number, because 240082781 - 2¹⁰ = 240081757 is a prime.

It is a super-2 number, since 2×240082781² = 115279483465387922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240082771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120041390 + 120041391.

It is an arithmetic number, because the mean of its divisors is an integer number (120041391).

Almost surely, 2^240082781 is an apocalyptic number.

It is an amenable number.

240082781 is a deficient number, since it is larger than the sum of its proper divisors (1).

240082781 is an equidigital number, since it uses as much as digits as its factorization.

240082781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 240082781 is about 15494.6048997708. The cubic root of 240082781 is about 621.5179429258.

The spelling of 240082781 in words is "two hundred forty million, eighty-two thousand, seven hundred eighty-one".