65413321 has 2 divisors, whose sum is σ = 65413322. Its totient is φ = 65413320.

The previous prime is 65413319. The next prime is 65413339. The reversal of 65413321 is 12331456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56025225 + 9388096 = 7485^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 65413321 - 2¹ = 65413319 is a prime.

Together with 65413319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65413391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32706660 + 32706661.

It is an arithmetic number, because the mean of its divisors is an integer number (32706661).

Almost surely, 2^65413321 is an apocalyptic number.

It is an amenable number.

65413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

65413321 is an equidigital number, since it uses as much as digits as its factorization.

65413321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 65413321 is about 8087.8502088009. The cubic root of 65413321 is about 402.9230067988.

Adding to 65413321 its reverse (12331456), we get a palindrome (77744777).

The spelling of 65413321 in words is "sixty-five million, four hundred thirteen thousand, three hundred twenty-one".