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204631225 = 5228129129
BaseRepresentation
bin11000011001001…
…10110010111001
3112021001100021021
430030212302321
5404341144400
632145542441
75033223331
oct1414466271
9467040237
10204631225
11a5566517
1258644a21
1333519286
141d26a0c1
1512e7171a
hexc326cb9

204631225 has 12 divisors (see below), whose sum is σ = 254654460. Its totient is φ = 163116800.

The previous prime is 204631223. The next prime is 204631241. The reversal of 204631225 is 522136402.

204631225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 6610041 + 198021184 = 2571^2 + 14072^2 .

It is not a de Polignac number, because 204631225 - 21 = 204631223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 204631225.

It is not an unprimeable number, because it can be changed into a prime (204631223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7540 + ... + 21589.

It is an arithmetic number, because the mean of its divisors is an integer number (21221205).

Almost surely, 2204631225 is an apocalyptic number.

204631225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204631225 is a deficient number, since it is larger than the sum of its proper divisors (50023235).

204631225 is a wasteful number, since it uses less digits than its factorization.

204631225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29420 (or 29415 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 204631225 is about 14304.9370847970. The cubic root of 204631225 is about 589.2830753828.

Adding to 204631225 its reverse (522136402), we get a palindrome (726767627).

The spelling of 204631225 in words is "two hundred four million, six hundred thirty-one thousand, two hundred twenty-five".