65352340221 has 48 divisors (see below), whose sum is σ = 102956172480. Its totient is φ = 36758050560.

The previous prime is 65352340213. The next prime is 65352340243. The reversal of 65352340221 is 12204325356.

It is a happy number.

It is not a de Polignac number, because 65352340221 - 2³ = 65352340213 is a prime.

It is a super-2 number, since 2×65352340221² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65352340021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22464115 + ... + 22467023.

It is an arithmetic number, because the mean of its divisors is an integer number (2144920260).

Almost surely, 2^65352340221 is an apocalyptic number.

It is an amenable number.

65352340221 is a deficient number, since it is larger than the sum of its proper divisors (37603832259).

65352340221 is a wasteful number, since it uses less digits than its factorization.

65352340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274 (or 5267 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 65352340221 its reverse (12204325356), we get a palindrome (77556665577).

The spelling of 65352340221 in words is "sixty-five billion, three hundred fifty-two million, three hundred forty thousand, two hundred twenty-one".