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225232520 = 2355630813
BaseRepresentation
bin11010110110011…
…00011010001000
3120200210222221012
431123030122020
5430124420040
634203303052
75403305402
oct1533143210
9520728835
10225232520
11106157587
126351aa88
13378802a6
1421cadb72
1514b90865
hexd6cc688

225232520 has 16 divisors (see below), whose sum is σ = 506773260. Its totient is φ = 90092992.

The previous prime is 225232489. The next prime is 225232523. The reversal of 225232520 is 25232522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 208109476 + 17123044 = 14426^2 + 4138^2 .

It is not an unprimeable number, because it can be changed into a prime (225232523) 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 3 ways as a sum of consecutive naturals, for example, 2815367 + ... + 2815446.

Almost surely, 2225232520 is an apocalyptic number.

225232520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225232520 is an abundant number, since it is smaller than the sum of its proper divisors (281540740).

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

225232520 is a wasteful number, since it uses less digits than its factorization.

225232520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630824 (or 5630820 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 225232520 is about 15007.7486652729. The cubic root of 225232520 is about 608.4296435160.

The spelling of 225232520 in words is "two hundred twenty-five million, two hundred thirty-two thousand, five hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 5630813 11261626 22523252 28154065 45046504 56308130 112616260 225232520