65538481 has 2 divisors, whose sum is σ = 65538482. Its totient is φ = 65538480.

The previous prime is 65538469. The next prime is 65538497. The reversal of 65538481 is 18483556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 7535025 = 7616^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 65538481 - 2¹⁹ = 65014193 is a prime.

It is a super-2 number, since 2×65538481² = 8590584983574722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65538181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32769240 + 32769241.

It is an arithmetic number, because the mean of its divisors is an integer number (32769241).

Almost surely, 2^65538481 is an apocalyptic number.

It is an amenable number.

65538481 is a deficient number, since it is larger than the sum of its proper divisors (1).

65538481 is an equidigital number, since it uses as much as digits as its factorization.

65538481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 65538481 is about 8095.5840431682. The cubic root of 65538481 is about 403.1798235716.

The spelling of 65538481 in words is "sixty-five million, five hundred thirty-eight thousand, four hundred eighty-one".