65305220 has 24 divisors (see below), whose sum is σ = 141566208. Its totient is φ = 25279200.

The previous prime is 65305199. The next prime is 65305237. The reversal of 65305220 is 2250356.

It is a happy number.

65305220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52046 + ... + 53285.

It is an arithmetic number, because the mean of its divisors is an integer number (5898592).

Almost surely, 2^65305220 is an apocalyptic number.

It is an amenable number.

65305220 is an abundant number, since it is smaller than the sum of its proper divisors (76260988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65305220 is a wasteful number, since it uses less digits than its factorization.

65305220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105371 (or 105369 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 65305220 is about 8081.1645200429. The cubic root of 65305220 is about 402.7009297312.

Adding to 65305220 its reverse (2250356), we get a palindrome (67555576).

The spelling of 65305220 in words is "sixty-five million, three hundred five thousand, two hundred twenty".