65811241 has 2 divisors, whose sum is σ = 65811242. Its totient is φ = 65811240.

The previous prime is 65811227. The next prime is 65811259. The reversal of 65811241 is 14211856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 1490841 = 8020^2 + 1221^2 .

It is a cyclic number.

It is not a de Polignac number, because 65811241 - 2⁵ = 65811209 is a prime.

It is a super-2 number, since 2×65811241² = 8662238883920162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65811841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32905620 + 32905621.

It is an arithmetic number, because the mean of its divisors is an integer number (32905621).

Almost surely, 2^65811241 is an apocalyptic number.

It is an amenable number.

65811241 is a deficient number, since it is larger than the sum of its proper divisors (1).

65811241 is an equidigital number, since it uses as much as digits as its factorization.

65811241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 65811241 is about 8112.4127730287. The cubic root of 65811241 is about 403.7383713546.

The spelling of 65811241 in words is "sixty-five million, eight hundred eleven thousand, two hundred forty-one".