65212320 has 48 divisors (see below), whose sum is σ = 205420320. Its totient is φ = 17389824.

The previous prime is 65212307. The next prime is 65212361. The reversal of 65212320 is 2321256.

65212320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 67450 + ... + 68409.

It is an arithmetic number, because the mean of its divisors is an integer number (4279590).

Almost surely, 2^65212320 is an apocalyptic number.

65212320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65212320 is an abundant number, since it is smaller than the sum of its proper divisors (140208000).

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

65212320 is a wasteful number, since it uses less digits than its factorization.

65212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135877 (or 135869 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 65212320 is about 8075.4145404431. The cubic root of 65212320 is about 402.5098849211.

Adding to 65212320 its reverse (2321256), we get a palindrome (67533576).

The spelling of 65212320 in words is "sixty-five million, two hundred twelve thousand, three hundred twenty".