525250000 has 140 divisors (see below), whose sum is σ = 1394982144. Its totient is φ = 190000000.

The previous prime is 525249997. The next prime is 525250009. The reversal of 525250000 is 52525.

It is a self number, because there is not a number n which added to its sum of digits gives 525250000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525250009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2749905 + ... + 2750095.

Almost surely, 2^525250000 is an apocalyptic number.

525250000 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 525250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697491072).

525250000 is an abundant number, since it is smaller than the sum of its proper divisors (869732144).

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

525250000 is an equidigital number, since it uses as much as digits as its factorization.

525250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 525250000 is about 22918.3332727317. Note that the first 3 decimals coincide. The cubic root of 525250000 is about 806.8423525848.

Multiplying 525250000 by its reverse (52525), we get a square (27588756250000 = 5252500²).

525250000 divided by its reverse (52525) gives a 4-th power (10000 = 10⁴).

The spelling of 525250000 in words is "five hundred twenty-five million, two hundred fifty thousand".