65225520 has 80 divisors (see below), whose sum is σ = 224673120. Its totient is φ = 17392896.

The previous prime is 65225513. The next prime is 65225533. The reversal of 65225520 is 2552256.

65225520 is a `hidden beast` number, since 652 + 2 + 5 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12939 + ... + 17258.

It is an arithmetic number, because the mean of its divisors is an integer number (2808414).

Almost surely, 2^65225520 is an apocalyptic number.

65225520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65225520 is an abundant number, since it is smaller than the sum of its proper divisors (159447600).

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

65225520 is a wasteful number, since it uses less digits than its factorization.

65225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30219 (or 30207 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 65225520 is about 8076.2317945933. The cubic root of 65225520 is about 402.5370412010.

Adding to 65225520 its reverse (2552256), we get a palindrome (67777776).

The spelling of 65225520 in words is "sixty-five million, two hundred twenty-five thousand, five hundred twenty".