65335021 has 2 divisors, whose sum is σ = 65335022. Its totient is φ = 65335020.

The previous prime is 65335013. The next prime is 65335031. The reversal of 65335021 is 12053356.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37393225 + 27941796 = 6115^2 + 5286^2 .

It is a cyclic number.

It is not a de Polignac number, because 65335021 - 2³ = 65335013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65335001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32667510 + 32667511.

It is an arithmetic number, because the mean of its divisors is an integer number (32667511).

Almost surely, 2^65335021 is an apocalyptic number.

It is an amenable number.

65335021 is a deficient number, since it is larger than the sum of its proper divisors (1).

65335021 is an equidigital number, since it uses as much as digits as its factorization.

65335021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 65335021 is about 8083.0081652810. The cubic root of 65335021 is about 402.7621758072.

Adding to 65335021 its reverse (12053356), we get a palindrome (77388377).

The spelling of 65335021 in words is "sixty-five million, three hundred thirty-five thousand, twenty-one".