65109220 has 24 divisors (see below), whose sum is σ = 149159808. Its totient is φ = 23676000.

The previous prime is 65109199. The next prime is 65109221. The reversal of 65109220 is 2290156.

It is not an unprimeable number, because it can be changed into a prime (65109221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147756 + ... + 148195.

It is an arithmetic number, because the mean of its divisors is an integer number (6214992).

Almost surely, 2^65109220 is an apocalyptic number.

It is an amenable number.

65109220 is an abundant number, since it is smaller than the sum of its proper divisors (84050588).

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

65109220 is a wasteful number, since it uses less digits than its factorization.

65109220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295971 (or 295969 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 65109220 is about 8069.0284421360. The cubic root of 65109220 is about 402.2976517211.

Adding to 65109220 its reverse (2290156), we get a palindrome (67399376).

The spelling of 65109220 in words is "sixty-five million, one hundred nine thousand, two hundred twenty".