64225520 has 40 divisors (see below), whose sum is σ = 149663040. Its totient is φ = 25632000.

The previous prime is 64225519. The next prime is 64225537. The reversal of 64225520 is 2552246.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 64225520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59546 + ... + 60614.

It is an arithmetic number, because the mean of its divisors is an integer number (3741576).

Almost surely, 2^64225520 is an apocalyptic number.

It is an amenable number.

64225520 is an abundant number, since it is smaller than the sum of its proper divisors (85437520).

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

64225520 is a wasteful number, since it uses less digits than its factorization.

64225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 64225520 is about 8014.0826050147. The cubic root of 64225520 is about 400.4692825527.

Adding to 64225520 its reverse (2552246), we get a palindrome (66777766).

It can be divided in two parts, 642 and 25520, that added together give a palindrome (26162).

The spelling of 64225520 in words is "sixty-four million, two hundred twenty-five thousand, five hundred twenty".