65073220 has 24 divisors (see below), whose sum is σ = 137479104. Its totient is φ = 25872096.

The previous prime is 65073179. The next prime is 65073223. The reversal of 65073220 is 2237056.

It is a super-2 number, since 2×65073220² = 8469047922336800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65073223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6402 + ... + 13081.

It is an arithmetic number, because the mean of its divisors is an integer number (5728296).

Almost surely, 2^65073220 is an apocalyptic number.

It is an amenable number.

65073220 is an abundant number, since it is smaller than the sum of its proper divisors (72405884).

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

65073220 is a wasteful number, since it uses less digits than its factorization.

65073220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19659 (or 19657 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 65073220 is about 8066.7973818610. The cubic root of 65073220 is about 402.2234923034.

The spelling of 65073220 in words is "sixty-five million, seventy-three thousand, two hundred twenty".