525899920 has 320 divisors, whose sum is σ = 1619896320. Its totient is φ = 154312704.

The previous prime is 525899909. The next prime is 525899923. The reversal of 525899920 is 29998525.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (525899923) 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 63 ways as a sum of consecutive naturals, for example, 9922614 + ... + 9922666.

It is an arithmetic number, because the mean of its divisors is an integer number (5062176).

Almost surely, 2^525899920 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 525899920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809948160).

525899920 is an abundant number, since it is smaller than the sum of its proper divisors (1093996400).

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

525899920 is a wasteful number, since it uses less digits than its factorization.

525899920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 49.

The square root of 525899920 is about 22932.5079308827. The cubic root of 525899920 is about 807.1749985299.

The spelling of 525899920 in words is "five hundred twenty-five million, eight hundred ninety-nine thousand, nine hundred twenty".