525220000 has 60 divisors (see below), whose sum is σ = 1292169186. Its totient is φ = 210080000.

The previous prime is 525219997. The next prime is 525220001. The reversal of 525220000 is 22525.

It can be written as a sum of positive squares in 5 ways, for example, as 30780304 + 494439696 = 5548^2 + 22236^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (525220001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6870 + ... + 33130.

Almost surely, 2^525220000 is an apocalyptic number.

525220000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646084593).

525220000 is an abundant number, since it is smaller than the sum of its proper divisors (766949186).

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

525220000 is an equidigital number, since it uses as much as digits as its factorization.

525220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26291 (or 26268 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 525220000 is about 22917.6787655295. The cubic root of 525220000 is about 806.8269911814.

Adding to 525220000 its reverse (22525), we get a palindrome (525242525).

It can be divided in two parts, 5252 and 20000, that added together give a palindrome (25252).

The spelling of 525220000 in words is "five hundred twenty-five million, two hundred twenty thousand".