2065281509 has 2 divisors, whose sum is σ = 2065281510. Its totient is φ = 2065281508.

The previous prime is 2065281497. The next prime is 2065281539. The reversal of 2065281509 is 9051825602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1934064484 + 131217025 = 43978^2 + 11455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065281509 is a prime.

It is a super-2 number, since 2×2065281509² = 8530775422834634162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2065281539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032640754 + 1032640755.

It is an arithmetic number, because the mean of its divisors is an integer number (1032640755).

Almost surely, 2^2065281509 is an apocalyptic number.

It is an amenable number.

2065281509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065281509 is an equidigital number, since it uses as much as digits as its factorization.

2065281509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 2065281509 is about 45445.3683998711. The cubic root of 2065281509 is about 1273.4828056504.

The spelling of 2065281509 in words is "two billion, sixty-five million, two hundred eighty-one thousand, five hundred nine".