525440520 has 320 divisors, whose sum is σ = 2013517440. Its totient is φ = 121651200.

The previous prime is 525440501. The next prime is 525440527. The reversal of 525440520 is 25044525.

525440520 is a `hidden beast` number, since 5 + 254 + 405 + 2 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (525440527) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 819400 + ... + 820040.

It is an arithmetic number, because the mean of its divisors is an integer number (6292242).

Almost surely, 2^525440520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525440520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006758720).

525440520 is an abundant number, since it is smaller than the sum of its proper divisors (1488076920).

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

525440520 is a wasteful number, since it uses less digits than its factorization.

525440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 525440520 is about 22922.4893936064. The cubic root of 525440520 is about 806.9398940875.

The spelling of 525440520 in words is "five hundred twenty-five million, four hundred forty thousand, five hundred twenty".