225004520 has 64 divisors (see below), whose sum is σ = 577296720. Its totient is φ = 78188544.

The previous prime is 225004519. The next prime is 225004523. The reversal of 225004520 is 25400522.

It can be written as a sum of positive squares in 8 ways, for example, as 84676804 + 140327716 = 9202^2 + 11846^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 225004492 and 225004501.

It is not an unprimeable number, because it can be changed into a prime (225004523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3887 + ... + 21566.

Almost surely, 2^225004520 is an apocalyptic number.

225004520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225004520 is an abundant number, since it is smaller than the sum of its proper divisors (352292200).

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

225004520 is a wasteful number, since it uses less digits than its factorization.

225004520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25494 (or 25490 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 225004520 is about 15000.1506659100. The cubic root of 225004520 is about 608.2242723527.

The spelling of 225004520 in words is "two hundred twenty-five million, four thousand, five hundred twenty".