86565481 has 2 divisors, whose sum is σ = 86565482. Its totient is φ = 86565480.

The previous prime is 86565439. The next prime is 86565487. The reversal of 86565481 is 18456568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 33872400 = 7259^2 + 5820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86565481 is a prime.

It is a super-2 number, since 2×86565481² = 14987165001522722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86565487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43282740 + 43282741.

It is an arithmetic number, because the mean of its divisors is an integer number (43282741).

Almost surely, 2^86565481 is an apocalyptic number.

It is an amenable number.

86565481 is a deficient number, since it is larger than the sum of its proper divisors (1).

86565481 is an equidigital number, since it uses as much as digits as its factorization.

86565481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

The square root of 86565481 is about 9304.0572332719. The cubic root of 86565481 is about 442.3658392903.

The spelling of 86565481 in words is "eighty-six million, five hundred sixty-five thousand, four hundred eighty-one".