65220 has 24 divisors (see below), whose sum is σ = 182784. Its totient is φ = 17376.

The previous prime is 65213. The next prime is 65239. The reversal of 65220 is 2256.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a plaindrome in base 13.

It is a nialpdrome in base 10 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 65220.

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, 484 + ... + 603.

It is an arithmetic number, because the mean of its divisors is an integer number (7616).

2⁶⁵²²⁰ is an apocalyptic number.

65220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65220 is an abundant number, since it is smaller than the sum of its proper divisors (117564).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91392).

65220 is a wasteful number, since it uses less digits than its factorization.

65220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 65220 is about 255.3820667157. The cubic root of 65220 is about 40.2525685384.

Adding to 65220 its reverse (2256), we get a palindrome (67476).

The spelling of 65220 in words is "sixty-five thousand, two hundred twenty".