65302220 has 24 divisors (see below), whose sum is σ = 139184304. Its totient is φ = 25730496.

The previous prime is 65302199. The next prime is 65302231. The reversal of 65302220 is 2220356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 65302192 and 65302201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23027 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (5799346).

Almost surely, 2^65302220 is an apocalyptic number.

It is an amenable number.

65302220 is an abundant number, since it is smaller than the sum of its proper divisors (73882084).

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

65302220 is a wasteful number, since it uses less digits than its factorization.

65302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48809 (or 48807 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 65302220 is about 8080.9789010986. The cubic root of 65302220 is about 402.6947631935.

Adding to 65302220 its reverse (2220356), we get a palindrome (67522576).

The spelling of 65302220 in words is "sixty-five million, three hundred two thousand, two hundred twenty".