65224320 has 256 divisors, whose sum is σ = 249108480. Its totient is φ = 14192640.

The previous prime is 65224319. The next prime is 65224331. The reversal of 65224320 is 2342256.

65224320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 309015 + ... + 309225.

It is an arithmetic number, because the mean of its divisors is an integer number (973080).

Almost surely, 2^65224320 is an apocalyptic number.

65224320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65224320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124554240).

65224320 is an abundant number, since it is smaller than the sum of its proper divisors (183884160).

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

65224320 is a wasteful number, since it uses less digits than its factorization.

65224320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 65224320 is about 8076.1575021789. The cubic root of 65224320 is about 402.5345725997.

Adding to 65224320 its reverse (2342256), we get a palindrome (67566576).

The spelling of 65224320 in words is "sixty-five million, two hundred twenty-four thousand, three hundred twenty".